Claraia pulchella (Nakazawa)
1953. Pseudomonotis (Claraia) pulchella Nakazawa, p. 264, pl. 3, figs. 1-7.
Type. —Holotype (UK JM10047A-a) from Chigono, Yakuno, Kyoto Pref.
Age and distribution. —Skytian. Yakuno group (undivided) in Maizuru zone.

Claraia sp, aff. C. decidens (Bittner)
1953. Pseudomonotis (Claraia) sp. aff. decidens Bittner: Nakazawa, p. 265, pl. 3, figs. 8, 9.
Age and distribution. —Skytian. Yakuno group (Narawara formation) in Maizuru zone.

Eumorphotis multiformis (Bittner)
1926. Pseudomonotis (Eumorphotis) multiformis Bittner var.: Matsushita, p. 421, pl. 8, fig. 6.-compare 1953. Eumorphotis sp. aff. multiformis Bittner: Nakazawa, p. 267, pl. 3, fig. 10.-1954. Eumorphotis multiformis (Bittner): Ozaki and Shikama, p. 43, pl. 19, figs. 1-6,-1955. Eumorphotis multiformis shionosawensis Ichikawa and Yabe, p. 6, pl. 2, figs. 1-15.-1956. Pecten spp. A and B.: Yabe, p. 290, pl. 17, figs. 1,1 12.-1963. Eumorphotis multiformis (Bittner): Kambe, p. 38, pl. 1, figs. 1-11, pl. 2, figs. 1-7.-1963. Eumorphotis multiformis shionosawensis Ichikawa and Yabe: Kambe, p. 40, pl. 2, fig. 8.-1971. Eumorphotis multiformis (Bittner): Nakazawa, p. 117, pl. 23, figs. 7-12.
Type. —Holotype of Eumorphotis multiformis shionosawensis (UMUT MM5401) from Shionosawa, Ueno, Gumma Pref.
Age and distribution. —Skytian. Kurotaki formation in Nangoku area, Shionosawa limestone in Sanchu area, and Kamura formation in Takachiho area. This species has been known from the Skytian of Ussuri.

Eumorphotis sp. aff. E. maritima Kiparisova
1961. Eumorphotis aff. maritima Kiparisova: Nakazawa, p. 259, pl. 12, figs. 25-28.
Age and distribution. —Skytian. Fukumoto group (Kusano formation) in Fukumoto area.

Eumorphotis sp. aff. E. tenuistriata (Bittner)
1961. Eumorphotis aff. tenuistriata (Bittner): Nakazawa, p. 260, pl. 12, fig. 29.
Age and distribution. —Skytian. Fukumoto group (Kusano formation) in Fukumoto area.

Asoella confertoradiata (Tokuyama) [Pl. 2, Figs. 8, 9]
1939. Pseudomonotis sp. aff. P. spitzbergensis: Katayama, pl. 8, fig. 1.-1959b, Eumorphotis (Asoella) confertoradiata Tokuyama, p. 4, text-fig. 1, pl. 1, figs. 1-6, 12.
Type. —Holotype (UMUT MM4498) from Higaeribara, Mine, Yamaguchi Pref.
Age and distribution. —Carnian (or lower Norian). Mine group (Aso formation) in Mine area.

Explanation of Plate 2 Fig. 1. Pterinella shinoharai Hayami. Holotype (GK H623S), plaster cast from right internal mould, ×0.67. Loc. Nekodani, Yatsushiro (Albian, Yatsushiro formation). Fig. 2. Pinctada (Eopinctada) matsumotoi Tamura: type-species of subgenus Eopinctada, Holotype (UMUT MM3704), rubber cast from right internal mould, ×1. Loc. Kamiumeki, Mifune (Cenomanian-Turonian, Mifune group). Fig. 3. Bakevellia (Neobakevellia) trigona (Yokoyama). Topotype (UMUT MM2651), left valve, ×1. Loc. Niranohama, Shizukawa (Hettangian, Shizukawa group). Fig. 4. Bakevellia (Bakevelloides) hekiensis (Kobayashi and Ichikawa): type-species of subgenus Bakevelloidcs. Plaster cast from left internal mould (UMUT MM4485), ×1. Loc. Shiraiwa, Mine (Carman, Mine group). Fig. 5. Waagenoperna triangularis (Kobayashi and Ichikawa). Rubber cast from right internal mould (UMUT MM4494), ×2. Loc. Higaeribara, Mine (Carnian-Norian, Mine group). Fig. 6. Kobayashites hemicylindricus Hayami: type-species of genus Kobayashites, Holotype (UMUT MM3130), rubber cast from left internal mould, ×2. Loc. Akaiwazaki, Shizukawa (Bajocian, Hashiura group). Fig. 7. Inoceramus (Inoceramus) maedae Hayami. Holotype (UMUT MM9076), right valve, ×0.86. Loc. Mitarai, Makito (Callovian, Tetori group). Fig. 8. Asoella confertoradiata (Tokuyama): type-species of genus Asoella. Holotype (UMUT MM4498), rubber cast from left external mould, ×1.5. Loc. Higaeribara, Mine (Carnian-Norian, Mine group). Fig. 9. The same species. Rubber cast from left internal mould (UMUT MM4503), ×1.5. Loc. ditto. Fig, 10. Daonella kotoi Mojsisovics. Holotype (UMUT MM5001), clay cast from right external mould, ×1. Loc. Zohoin, Sakawa (Ladinian, Zohoin group).

Asoella laevigata (Tokuyama)
1959b. Eumorphotis (Asoella) laevigata Tokuyama, p. 5, text-fig. 2, pl. 1, figs. 7-10.
Type. —Holotype (UMUT MM4505) from Higaeribara, Mine, Yamaguchi Pref.
Age and distribution. —Carnian (or lower Norian). Mine group (Aso formation) in Mine area.

Asoella nakatsukensis (Tokuyama)
1959b. Eumorphotis (Asoella) nakatsukensis Tokuyama, p. 6, pl. 1, figs. 11, 13, 14.
Type. —Holotype (UMUT MM4510) from Morimoto, Asa, Yamaguchi Pref.
Age and distribution. —Carnian. Mine group (Nakatsuka formation) in Asa area.

Leptochondria minima (Kiparisova)
1928. Pseudomonotis cf. iwanowi Bittner: Yehara, p. 170, pl. 16, figs. 13, 14,-1961. Leptochondria? minima (Kiparisova): Nakazawa, p. 260, pl. 12, figs. 16, 17.-1963. Eopecten minimus (Kiparisova): Kambe, p. 47, pl. 5, figs. 17-21.-1971. Leptochondria minima (Kiparisova): Nakazawa, p. 119, pl. 23, figs. 13, 14.
Type. —Holotype from Ussuri.
Age and distribution. —Skytian. Yakuno group (Narawara formation) in Maizuru zone, Kamura formation in Takachiho area, and Taho formation in Uonashi area.

Leptochondria? sp. aff. L. virgalensis (Wittenburg)
1961. Leptochondria (?) aff. virgalensis Wittenburg: Nakazawa, p. 261, pl. 12, fig. 18.
Age and distribution. —Skytian. Yakuno group (Oro formation) in Maizuru zone.

Leptochondria ? okuyamensis Nakazawa
1961. Leptochondria (?) okuyamensis Nakazawa, p. 262, pl. 12, figs. 19-21.
Type. —Holotype (UK JM10663) from Miyagatake, Fukuchiyama, Kyoto Pref.
Age and distribution. —Skytian. Yakuno group (Hirobatake formation) in Maizuru zone.

Leptochondria? sp. cf. L. bittneri (Kiparisova)
1961. Leptochondria (?) cf. bittneri (Kiparisova): Nakazawa, p. 262, pl. 12, figs. 22-24.
Age and distribution. —Skytian. Yakuno group (Narawara formation) in Maizuru zone.

Leptochondria? hataii Murata
1973. Leptochondria? hataii Murata, p. 273, pl. 29, figs. 1-13.
Type. —Holotype (IGPS no. 92661) from Hikado, Motoyoshi, Miyagi Pref.
Age and distribution. —Skytian. Inai group (Osawa and Fukkoshi formations) in Motoyoshi area.

Streblochondria matsushitai Nakazawa
1926. Posidonia nov. sp.: Matsushita, pl. 8, fig. 4,-1926. Pecten (Entolium) discites Schlotheim: Matsushita, pl. 8, fig. 3.-1926. Pecten (Entolium) discites var. microtis Bittner: Matsushita, pl. 8, fig. 7.-1926. Pleuronectites nov. sp.: Matsushita, pl. 8, figs. 2, 5.-1926. Lima (Plagiostoma) nov. sp.: Matsushita, pl. 8, fig. 13.-1971. "Stretlochwdria" matsushitai Nakazawa, p. 122, text-fig. 2, pl. 23, figs. 20, 21, pl. 24, figs. 1-9, 11.-compare 1971. Streblochondria cf. matsushitai Nakazawa, p. 124, pl. 24, fig. 10.
Type. —Holotype (UK JM11237) from Kurotaki, Nangoku, Kochi Pref.
Age and distribution. —Skytian. Kurotaki formation in Nangoku area, and Kamura formation in Takachiho area.

Eumorphotis ? sp. aff. E. ? spitzbergensis (Boehm)
1949c. Pseudomonotis (Eumorphotis) aff. spitzbergensis (Boehm): Kobayashi and Ichikawa, p. 247, pl. 10, figs. 9-11.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Oxytoma (Oxytoma) mojsisovicsi Teller [Pl. 3, Fig. 1]
1927. Oxytoma mojsisovicsi Teller: Yehara, p. 32, pl. 4, figs. 9, 10.-1927. Pseudomonotis zitteli Teller: Yehara, p. 30, pl. 4, figs. 7, 8.-1950b. Oxytoma zitteli (Teller): Kobayashi and Ichikawa, p. 220, pl. 2, figs. 3-6.-1950b. Oxytoma subzitteli Kobayashi and Ichikawa, p. 221, pl. 2, figs. 7, 8.-1950b. Oxytoma yeharai Kobayashi and Ichikawa, p. 222, pl, 2, figs. 1, 2, pl. 3, fig. 13.-1957b. Oxytoma subzitteli Kobayashi and Ichikawa: Nakano, p. 64, pl. 9, fig. l.-1959b. Oxytoma zitteli (Teller): Tokuyama, p. 7, pl. 1, figs. 19-21. -1959b. Oxytoma subzitteli Kobayashi and Ichikawa: Tokuyama, p. 8, pl. 1, figs. 23, 24.-1963. Oxytoma cf. subzitteli Kobayashi and Ichikawa: Nakazawa, p. 54, pl. 2, figs. 10-12.-1964a. Oxytoma cf. subzitteli Kobayashi and Ichikawa: Nakazawa, p. 36, pl. 5, figs. 6-8.-1969. Oxytoma (Oxytoma) mojsisovicsi Teller: Ozawa and Hayami, p. 34, pl. 3, figs. 6-11.
Type. —Holotype of Oxytoma subzitteli (UMUT MM5109) and holotype of Oxytoma yeharai (UMUT MM5101) from Umenokidani, Sakawa, Kochi Pref.
Age and distribution. —Carnian-Norian. Kochigatani group (lower part) in Sakawa and Ome areas, Kyowa formation in Nariwa area, Mine group (Hirabara formation) in Mine area, and Saragai group in Shizukawa area. This species is also widely distributed in eastern Siberia.

Explanation of Plate 3 Fig. 1. Oxytoma (Oxytoma) mojsisovicsi Teller. Holotype of O. yeharai (UMUT MM5101), rubber cast from left external mould, ×1. Loc. Umenokidani, Sakawa (Carnian, Kochigatani group). Fig. 2. Entolium inequivalve Hayami. Holotype (UMUT MM3166), rubber cast from right external mould, ×1. Loc. Mitarai, Makito (Callovian, Tetori group). Fig. 3, Somapecten kamimanensis Kimura: type-species of genus Somapecten. Paratype (UMUT MM7120), rubber cast from right(?) internal mould, ×1.5. Loc. Yasukurazawa, Soma (Kimmeridgian, Soma group). Fig. 4. The same species. Holotype (UMUT MM7119), rubber cast from left(?) internal mould, ×1.5. Loc. ditto. Fig. 5. Neithea (Neithea) ficalhoi (Choffat). Two right valves (upper: GK H6276, lower: GK H6636), ×1. Loc. Hiraiga, Tanohata (Aptian, Miyako group). Fig. 6. Neithea (Neithea) nipponica Hayami. Paratype (GK H6632), right valve, ×1. Loc. Aketo, Tanohata (Albian, Miyako group). Fig, 7. Tosapecten suzukii. suzukii (Kobayashi): ncminal subspecies of the type-species of genus Tosapecten. Holotype (UMUT MM5029), rubber cast from right external mould, ×1. Loc. Shimoyama, Sakawa (Carnian, Kochigatani group). Fig. 8. Chlamys mojsisovicsi Kobayashi and Ichikawa. Holotype (UMUT MM5187), rubber cast from left external mould, ×2. Kasayadani, Sakawa (Carnian, Koohigatani group). Fig. 9. Radulonectites japonicus Hayami: type-species of genus Radulonectites. Holotype (UMUT MM2689), rubber cast from left external mould, ×1. Loc. Tsuchizawa, Otari (Pliensbachian?, Kuruma group). Fig. 10. The same species. Paratype (UMUT MM2690), rubber cast from right external mould, ×1. Loc. ditto. Fig. 11. Spondylus (Spondylus) decoratus Nagao. Topotype (GK H6306), left valve, ×1. Loc. Hideshima, Miyako (Aptian, Miyako group). Fig. 12. The same species. Topotype (GK H6309), right valve, ×1. Loc. ditto.

Oxytoma (Oxytoma) kashiwaiensis Kobayashi and Ichikawa
1950b. Oxytoma kashiwaiensis Kobayashi and Ichikawa, p. 223, pl. 3, figs. 1-3.-1950b. Oxytoma pulchra Kobayashi and Ichikawa, p. 224, pl. 3, fig. 4.-1950b. Oxytoma sedaka Kobayashi and Ichikawa, p. 225, pl. 3, figs. 8-12.-1954c. Oxytoma pulchra Kobayashi and Ichikawa: Ichikawa, p. 49, pl. 2, figs. 6-11, (?) 12.-1956. Oxytoma pulchra Kobayashi and Ichikawa: Nakazawa, p. 246, pl. 4, fig. 16.-1959b. Oxytoma pulchrum Kobayashi and Ichikawa [sic]: Tokuyama, p. 9, pl. 1, fig. 22.
Type. —Holotype (UMUT MM5116) from Kashiwai, Sakawa, Kochi Pref. Holotypes of Oxytoma pulchra (UMUT MM5119) and Oxytoma sedaka (UMUT MM5123) from the same locality.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa and Sakuradani areas, Nabae group (N3 formation) in Maizuru zone, and Mine group (Hirabara formation) in Mine area.

Oxytoma (Oxytoma) atsuensis Tokuyama
1959b. Oxytoma atsuense Tokuyzma [sic], p. 7, pl..1, fig. 25.
Type. —Holotype (UMUT MM4522) from Shirogawara, Mine, Yamaguchi Pref.
Age and distribution. —Carnian (or upper Ladinian). Atsu group in Mine area.

Oxytoma (Oxytoma) multistriata Tokuyama
1959b. Oxytoma multlstriatum Tokuyama [sic], p. 10, pl. 1, figs. 26, 27.
Type. —Holotype (UMUT MM4523) from Higaeribara, Mine, Yamaguchi Pref.
Age and distribution. —Carnian (or lower Norian). Mine group (Aso formation) in Mine area.

Oxytoma (Oxytoma) inequivalvis (Sowerby)
1959c. Oxytoma cf. inequivalve (Sowerby) [sic]: Hayami, p. 57, pl. 5, figs. 6-11.-1959h. Oxytoma inequivalve (Sowerby) [sic]: Hayami, p. 50, pl. 5, figs. 18, 19, pl. 7, fig. 17.
Age and distribution. —Sinemurian-Bajocian. Hashiura group (Aratozaki formation) in Shizukawa area, and Toyora group (Higashinagano formation) in Toyoda area. This species seems to be cosmopolitan.
Remarks. —The Japanese specimens of O. (O.) inequivalvis are generally much smaller than European ones.

Oxytoma (Oxytoma) kobayashii Hayami
1959h. Oxytoma kobayashii Hayami, p. 49, pl. 5, figs. 15-17.
Type. —Holotype (UMUT MM3372) from Higashinakayama, Kikukawa, Yamaguchi Pref.
Age and distribution. —Sinemurian (or Pliensbachian). Toyora group (Higashinagano formation) in Toyoda area.

Oxytoma (Oxytoma) tetoriensis Hayami
1959f. Oxytoma tetoriense Hayami [sic], p. 148, pl. 12, figs. 14, 15.
Type. —Holotype (UMUT MM3155) from Mitarai, Shokawa, Gifu Pref.
Age and distribution. —Callovian. Tetori group (Mitarai formation) in Makito area.

Oxytoma (Palmoxytoma) sp. cf. O. (P.) cygnipes (Young and Bird)
1959h. Oxytoma cf. cygnipes (Young and Bird): Hayami, p. 48, pl. 5, fig, 14.
Age and distributiom. —Sinemurian. Toyora group (Higashinagano formation) in Toyoda area.

Meleagrinella japonica Hayami
1959h. Meleagrinella japonica Hayami, p. 47, pl. 5, figs. 20-22.
Type. —Holotype (UMUT MM3368) from Higashinagano, Toyoda, Yamaguchi Pref.
Age and distribution. —Sinemurian. Toyora group (Higashinagano formation) in Toyoda area.

Meleagrinella okayamensis Hayami
1961a. Meleagrinella okayamensis Hayami, p. 115, pl. 16, figs. 2, 3.
Type. —Holotype (UMUT MM3676) from Ochiai, Oosa, Okayama Pref.
Age and distribution. —Toarcian (or thereabout). Yamaoku formation in Osakabe area.

Oxytoma? dieneri Kobayashi and Ichikawa
1950b. "Oxytoma" dieneri Kobayashi and Ichikawa, p. 226, pl. 2, fig. 9.
Type. —Holotype (UMUT MM5112) from Togo, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Bositra japonica (Kobayashi and Hukasawa)
1940. Posidonia japonica Kobayashi and Hukasawa, p. 517, figs. 1, 2.
Type. —Syntype (UMUT MM5035) from Biwazaki, Utatsu, Miyaki Pref.
Age and distribution. —Anisian? Inai group (horizon uncertain) in Shizukawa area.

Bositra sp. cf. B. ornati (Quenstedt)
1961c. Posidonia sp. ex gr. ornati Quenstedt: Hayami, p. 286, pl. 14, fig. 6.
Age and distribution. —Bajocian. Toyora group (Utano formation) in Toyoda area.

Daonella sakawana Mojsisovics
1888. Daonella Sakawana Mojsisovics, p. 174, pl. 2, fig. 4 (non fig. 5).-1915. Daonella sakawana Mojsisovics: Diener, p. 25, pl. 4, figs. 3, 4.-1959. Daonella sakawana Mojsisovics: Kobayashi and Tokuyama, p. 17, pl. 2, fig. 8.-1963. Daonella sakawana Mojsisovics: Ichikawa, p. 10, pl. 18, fig. 4.
Type. —Lectotype restricted by Yabe and Shimizu (1927, p. 124) and designated by Ichikawa (1963, p. 10), which is to be preserved in Wien but now missing, from Zohoin, Sakawa, Kochi Pref. Plaster cast of the lectotype (UMUT MM5002).
Age and distribution. —Ladinian. Zohoin group in Sakawa area.

Daonella kotoi Mojsisovics [Pl. 2, Fig. 10]
1888. Daonella Kotoi Mojsisovics, p. 174, pl. 2, fig. 3.-1959. Daonella kotoi Mojsisovics: Kobayashi and Tokuyama, p. 16, pl. 2, figs. 3-6, pl. 3, fig. 1, pl. 4, figs. 2, 3.-1959. Daonella kotoi Mojsisovics var.: Kobayashi and Tokuyama, p. 17, pl, 2, fig. 7.-1963. Daonella kotoi Mojsisovics: Ichikawa, p. 10, pl. 18, fig. 3.
Type. —Holotype by monotypy, which is to be preserved in Wien but now missing, from Zohoin, Sakawa, Kochi Pref. Plaster cast of the holotype (UMUT MM5001).
Age and distribution. —Ladinian. Zohoin group in Sakawa area.

Daonella densisulcata Yabe and Shimizu
compare 1888. Daonella Sakawana Mojsisovics, p. 174, pl. 2, fig. 5 (non fig. 4).-1927. Daonella densisulcata Yabe and Shimizu, p. 124, 134, pl. 11, fig. 13, pl. 12, figs. 8, 9.-1927. Daonella densisulcata var. subquadrata Yabe and Shimizu, p. 122, pl. 12, fig. 9.-1959. Daonella densisulcata Yabe and Shimizu: Kobayashi and Tokuyama, p. 20.-1959. Daonella subquadrata subquadrata Yabe and Shimizu: Kobayashi and Tokuyama, p. 19, pl. 1, figs. 6, 7, pl. 2, figs. 9, 10.-1959. Daonella subquadrata zohoinensis Kobayashi and Tokuyama, p. 19, pl. 1, figs. 12, 13. pl. 2, fig. 9, pl. 3, fig. 5.-1959. Daonella subquadrata symmetrica Kobayashi and Tokuyama, p. 19, pl. 1, figs. 8-11.-compare 1963. Daonella cf. densisulcata Yabe and Shimizu: Ichikawa, p. 10, pl. 18, fig. 5.
Type. —Syntype (IGPS not registered) from northeast of the Rifu station, Rifu, Miyagi Pref. Holotype by monotypy of Daonella densisulcata var. subquadrata (IGPS not registered) from the same locality. Holotypes of Daonella subquadrata zohoinensis (UMUT MM3510) and Daonella subquadrata symmetrica (UMUT MM3525) from Zohoin, Sakawa, Kochi Pref.
Age and distribution. —Ladinian. Rifu formation in Rifu area, and Zohoin group in Sakawa area.

Daonella multistriata Yabe and Shimizu
1927. Daonella kotoi var. multistriata Yabe and Shimizu, p. 123, pl. 11, figs. 12, 14, pl. 13, fig. 11.-1959. Daonella multistriata Yabe and Shimizu: Kobayashi and Tokuyama, p. 20, pl. 3, fig. 7.
Type. —Syntype (IGPS not registered) from several localities near the Rifu station, Rifu, Miyagi Pref.
Age and distribution. —Ladinian. Rifu formation in Rifu area.

Daonella alta Yabe and Shimizu
1927. Daonella kotoi var. alta Yabe and Shimizu, p. 122, pl. 12, fig. 10.-compare 1931. Daonella cf. kotoi var. alta Yabe and Shimizu: Kobayashi, p. 257, pl. 25, figs. 1, 13.-1959. Daonella alta Yabe and Shimizu: Kobayashi and Tokuyama, p. 13, pl. 1, figs. 4, 5.
Type. —Holotype by monotypy (IGPS not registered) from Zohoin, Sakawa, Kochi Pref.
Age and distribution. —Ladinian. Zohoin group in Sakawa area.

Daonella indica Bittner
1959. Daonella indica Bittner: Kobayashi and Tokuyama, p. 14, pl. 1, figs. 1, 2. pl. 2, figs. 1, 2, pl. 3, figs. 3, 4, 11, 12, pl. 4, fig. 1.
Age and distribution. —Ladinian. Zohoin group in Sakawa, Ino and Sakuradani areas. This species has been known from Himalayas, south China, Timor, Alps and many other areas of Tethys region.

Daonella yoshimurai Kobayashi
1935. Daonella yoshimurai Kobayashi, p. 30, pl. 7, fig. 7.-1959, Daonella yoshimurai Kobayashi: Kobayashi and Tokuyama, p. 22, pl. 3, fig. 2.
Type. —Holotype (UMUT MM5520) from Shirogawara, Mine, Yamaguchi Pref.
Age and distribution. —Carnian (or upper Ladinian). Atsu group in Mine area.

Daonella tenuistriata Kobayashi and Tokuyama
1959. Daonella tenuistriata Kobayashi and Tokuyama, p. 13, pl. 3, fig. 10.
Type. —Holotype (UMUT MM3473) from Zohoin, Sakawa, Kochi Pref.
Age and distribution. —Ladinian. Zohoin group in Sakawa area.

Daonella iwayai Kobayashi and Tokuyama
1959. Daonella iwayai Kobayashi and Tokuyama, p. 15, pl. 2, fig. 15, pl, 3, figs. 8, 9, pl. 4, fig. 4.
Type. —Holotype (UMUT MM3497) from Usugatani, Kaminaka, Tokushima Pref.
Age and distribution. —Ladinian. Zohoin group in Sakuradani, Ino and Sakawa areas.

Daonella pectinoides Kobayashi and Tokuyama
1959. Daonella pectinoides Kobayashi and Tokuyama, p. 20, pl. 2, fig. 12, pl. 3, fig. 6.
Type. —Holotype (UMUT MM3532) from Zohoin, Sakawa, Kochi Pref.
Age and distribution. —Ladinian. Zohoin group in Sakawa area.
Remarks. —This is possibly conspecific with Daonella iwayai.

Daonella asymmetrica Kobayashi and Tokuyama
1959. Daonella asymmetrica Kobayashi and Tokuyama, p. 22, pl. 2, fig. 13.
Type. —Holotype (UMUT MM3534) from Zohoin, Sakawa, Kochi Pref.
Age and distribution. —Ladinian. Zohoin group in Sakawa area.

Daonella hiratai Kobayashi and Tokuyama
1959. Daonella hiratai Kobayashi and Tokuyama, p. 22, pl. 2, fig. 14.
Type. —Holotype (UMUT MM3535) from Zohoin, Sakawa, Kochi Pref.
Age and distribution. —Ladinian. Zohoin group in Sakawa area.
Remarks. —This species seems to have been proposed on a deformed specimen of Daonella densisulcata.

Daonella sp. cf. D. spitiensis Bittner
1959. Daonella cf. spitiensis Bittner: Kobayashi and Tokuyama, p. 15, pl. 1, fig. 3.
Age and distribution. —Ladinian. Zohoin group in Sakawa area.

Halobia styriaca (Mojsisovics)
1970. Halobia styriaca (Mojsisovics): Kobayashi and Ishibashi, p. 244, pl. 26, figs. 1-10.
Age and distribution. —Carnian. Nakijin formation in Motobu area, Okinawa Pref. This species has been known from various areas of Tethys region.

Halobia molukkana Wanner
1931. Halobia molukkana Wanner: Kobayashi, p. 231.-1943. Halobia molukkana Wanner: Kobayashi and Aoti, p. 248, pl. 25, figs. 1-4, 5 (?), 15 (?).-1954b. Halobia molukkana Wanner: Ichikawa, p. 186, pl. 17, figs. 16, 17 (?).-1959b. Halobia molukkana Wanner: Tamura, p. 221, pl. 2, fig. 12.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa, Tanoura, Itsukaichi and Ino areas. This species has been known from Rotti and Timor.

Halobia kawadal Yehara
1927. Halobia kawadai Yehara, p. 31, pl. 3, figs. 5, 6.-1943. Halobia kawadai Yehara: Kobayashi and Aoti, p. 245, pl. 24, figs. 1-3, 4 (?), pl. 25, figs. 8, 9.-1954c. Halobia kawadai Yehara: Ichikawa, p. 54, pl. 1, fig. 3.-1955. Halobia kawadai Yehara: Nakazawa, p. 243, pl. 13, fig.. 1.-compare 1955. Halobia cf. kawadai Yehara: Nakazawa, p. 244, pl. 13, fig. 2.-1959b. Halobia kawadai Yehara: Tamura, p. 221, pl. 2, fig. 11.-1959b. Halobia kawadai Yehara: Tokuyama, p. 16, pl. 1, figs. 30, 31.
Type. —Syntype (UK? not registered) from Shimoyama, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa, Sakuradani and Sakamoto areas, Nabae group (N3 formation) in Maizuru zone, and Mine group (Hirabara formation) in Mine area.

Halobia sedaka Kobayashi and Aoti
1943. Halobia sedaka Kobayashi and Aoti, p. 247, pl. 25, fig. 7.-compare 1967. Halobia sp. aff. sedaka Kobayashi and Aoti: Nakazawa and Nogami, p. 19, pl. 1, fig. 11.
Type. —Holotype (UMUT MM5051) from Kasayadani, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Halobia obsoleta Kobayashi and Aoti
1943. Halobia obsoleta Kobayashi and Aoti, p. 248, pl. 24, figs. 8-11.-1954c. Halobia obsoleta Kobayashi and Aoti: Ichikawa, p. 55.-1955. Halobia. obsoleta Kobayashi and Aoti: Nakazawa, p. 244, pl. 13, fig. 3.
Type. —Holotype (UMUT MM5043) from Shimoyama, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa and Sakuradani areas, and Nabae group (N3 formation) in Maizuru zone.

Halobia multilineata Kobayashi and Aoti
1943. Halobia multilineata Kobayashi and Aoti, p. 249, pl. 25, fig. 6.
Type. —Holotype (UMUT MM5050) from Nakajima, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Halobia alta Kobayashi and Aoti
1943. Halobia alta Kobayashi and Aoti, p. 249, pl. 24, figs. 5, 6.
Type. —Holotype (UMUT MM5040) from Tokombo, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Halobia longissima Kobayashi and Aoti
1943. Halobia longissima Kobayashi and Aoti, p. 251, pl. 24, fig. 7.
Type. —Holotype (UMUT MM5041) from Shimoyama, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Halobia aotii Kobayashi and Ichikawa
1943. Halobia multistriata Kobayashi and Aoti, p. 250, pl. 24, figs. 12, 13, pl, 25, figs. 10-14. (non Halobia kwaluana var. multistriata Volz, 1899)-1949b. Halobia aotii Kobayashi and Ichikawa, p. 185.-compare 1955. Halobia cf. aotii Kobayashi and Ichikawa; Nakazawa, p. 246, pl. 13, fig. 11.-1959b, Halobia aotii Kobayashi and Ichikawa; Tokuyama, p. 17, pl. 1, fig. 33.
Type. —Holotype (UMUT MM5054) from Aisaka, Asa, Yamaguchi Pref.
Age and distribution. —Carnian. Mine group in Asa area.

Halobia kashiwaiensis Kobayashi and Ichikawa
1949b. Halobia kashiwaiensis Kobayashi and Ichikawa, p. 185, pl. 6, fig. 11.-1959b. Halobia kashiwaiensis Kobayashi and Ichikawa; Tokuyama, p. 16, pl. 1, fig. 32.
Type. —Holotype (UMUT MM5220) from Kashiwai, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area, and Mine group (Hirabara formation) in Mine area.

Halobia subsedaka Tokuyama
1959b. Halobia subsedaka Tokuyama, p. 15, pl. 1, fig. 29.
Type. —Holotype (UMUT MM4526) from Shirogawara, Mine, Yamaguchi Pref.
Age and distribution. —Carnian (or upper Ladinian). Atsu group in Mine area.

Halobia sp. cf. H. austriaca Mojsisovics
1954b. Halobia aff. austriaca Mojsisovics: Ichikawa, p. 187, pl. 17, fig. 15.-1955. Halobia cf. austriaca Mojsisovics: Nakazawa, p. 247, pl. 13, fig. 9.
Age and distribution. —Carnian. Kochigatani group (lower part) in Itsukaichi area, and Nabae group (N3 formation) in Maizuru zone.

Halobia sp. aff. H. fallax Mojsisovics
1964. Halobia sp. aff. fallax Mojsisovics: Nakazawa, p. 35, pl. 5, figs. 9, 10.
Age and distribution. —Norian. Saragai group in Shizukawa area.

Halobia sp. cf. H. obruchevi Kiparisova
1964. Halobia sp. cf. obruchevi Kiparisova: Nakazawa, p. 35, pl. 5, figs, 11, 12 (?).
Age and distribution. —Norian. Saragai group in Shizukawa area.

Halobia sp. aff. H. disperseinsecta Kittl
1967. Halobia sp. aff. disperseinsecta Kittl: Nakazawa and Nogami, p. 20, pl. 1, fig. 10.
Age and distribution. —Carnian (or Norian). "Tano formation" in western hills of Kyoto.

Halobia sp. cf. H. talauana Wanner
1967. Halobia sp. cf. talauana Wanner: Nakazawa and Nogami, p. 18, pl. 1, figs. 1-5.
Age and distribution. —Carnian (or Norian). "Tano formation" in western hills of Kyoto.

Didymotis akamatsui (Yehara)
1924. Inoceramus akamatsui Yehara, p. 37, pl. 2, figs. 2-4.-1940. Inoceramus (Sergipia?) akamatsui Yehara: Nagao and Matsumoto, p. 54, pl. 13, figs. 3, 5, pl. 22, fig, 6.
Type. —Syntype (UK? not registered) from Furushiroyama, Uwajima, Ehime Pref.
Age and distribution. —Coniacian. Uwajima group (Furushiroyama formation) in Uwajima area, Onogawa group in Onogawa area, Futaba group in Futaba area, and Upper Yezo group in various areas of Hokkaido.
Remarks. —The generic reference of this species to Didymotis was already suggested by Imlay (1955, p. 549).

Monotis (Entomonotis) scutiformis (Teller)
1961. Monotis (Entomonotis) typica (Kiparisova): Hase, p. 80, pl. 12, figs. 1-11.-1964a. Monotis (Entomonotis) typica (Kiparisova): Nakazawa, p. 31, pl. 3, figs. 4-8, pl. 4, figs. 1, 2.-compare 1964a. Monotis (Entomonotis) sp. aff. scutiformis (Teller): Nakazawa, p. 33, pl. 5, figs. 1, 2.-compare 1965. Monotis (Entomonotis) cf. typica (Kiparisova): Tamura, p. 50, pl. 1, figs. 1, 2.
Age and distribution. —Norian. Saragai group in Shizukawa area, and Kuga group in Miwa area. This species has been known from eastern Siberia.
Remarks. —Many authors have regarded Monotis (Entomonotis) scutiformis var. typica as a distinct species, but I agree here with Kiparisova et al. (1966) in considering that the name was given to the specimens in the range of variation of M. (E.) scutiformis.

Monotis (Entomonotis) jakutica (Teller)
1963. Monotis (Entomonotis) yakutica (Teller) [sic]: Nakazawa, p. 51, pl. 1, figs. 15-27.-compare 1963. Monotis (Entomonotis) aff. sublaevis (Teller): Nakazawa, p. 50, pl. 1, figs. 9, 10.-1965. Monotis (Entomonotis) yakutica (Teller) [sic]: Tamura, p. 52, pl. 2, figs. 13-15.
Age and distribution. —Norian. Nariwa group in Nariwa area, and Kochigatani group (upper part) in Miyamadani (Kuriki) area. This species has been known from eastern Siberia.

Monotis (Entomonotis) ochotica (Keyseriing)
1888. Pseudomonotis ochotica (Keyserling) Teller: Mojsisovics, p. 175, pl. 2, figs. 6-8.-1915. Pseudomonotis ochotica Keyseriing: Diener, p. 26, pl. 4, fig. 7.-1915. Pseudomonotis ochotica Keyserling var. densistriata Teller: Diener, p. 27, pl. 4, fig. 5.-1915. Pseudomonotis ochotica Keyseriing var. eurachis Teller: Diener, p. 29, pl. 3, fig. 3, pl. 4, figs. 6, 8.-1927. Pseudomonotis ochotica (Keyseriing): Yehara, p. 29, pl. 4, figs. 1-3.-1927. Pseudomonotis ochotica var. eurachis Teller: Yehara, p. 29, pl. 4, figs. 4, 5.-1927. Pseudomonotis subcircularis Gabb: Yehara, p. 30, pl. 4, fig. 6.-1935. Pseudomonotis ochotica var. densistriata Teller; Kobayashi, p. 27, pl. 7, fig. 11.-1935. Pseudomonotis ochotica var. eurachis Teller: Kobayashi, p. 27, pl. 7, fig. 11.-1935, Pseudomonotis ochotica var. pachypleura Teller: Kobayashi, p. 27, pl. 7, fig. 10.-1944. Pseudomonotis ochotica (Keyseriing): Takagi, p. 197, fig. 2.-1949c, Entomonotis ochotica (Keyserling); Kobayashi and Ichikawa, p. 249, p. 9, fig. 1.-1949c. Entomonotis ochotica var. densistriata (Teller): Kobayashi and Ichikawa, p. 253, pl. 9, fig. 15.-1949c. Entomonotis ochotica var. eurachis (Teller): Kobayashi and Ichikawa, p. 252, pl. 9, figs. 2-4.-1949c. Entomonotis pachypleura (Teller): Kobayashi and Ichikawa, p. 256, pl. 9, fig. 10.-1949c. Entomonotis ambigua (Teller): Kobayashi and Ichikawa, p. 255, pl. 9, figs. 9, 13.-1954c. Entomonotis ochotica (Keyserling): Ichikawa, p. 51.-1954c. Entomonotis ochotica var. densistriata (Teller): Ichikawa, p. 51.-1954c. Entomonotis ochotica var. eurachis Ichikawa, p, 51-1963. Monotis (Entomonotis) ochotica ochotica (Keyserling): Ichikawa, p. 11, pl. 18, fig. 8.-1963. Monotis (Entomonotis) ochotica eurachis (Teller): Ichikawa, p. 11, pl. 18, fig. 6.-1963. Monotis (Entomonotis) ochotica densistriata (Teller); Ichikawa, p. 11, pl. 18, fig. 7.-1963. Monotis (Entomonotis) ochotica (Keyserling): Nakazawa, p. 52.-1963. Monotis (Entomonotis) ochotica sparsicostata (Teller): Nakazawa, p. 52, pl. 2, figs. 1-4.-1963. Monotis (Entomonotis) ochotica jitoensis Nakazawa, p. 52, pl. 2, figs. 5-7.-1964a. Monotis (Entomonotis) ochotica densistriata (Teller): Nakazawa, p. 34, pl. 5, figs. 3-5.-1965. Monotis (Entomonotis) ochotica ochotica (Keyserling): Tamura, p. 50, pl. 1, figs. 10-12,-1965. Monotis (Entomonotis) ochotica desnsistriata (Teller): Tamura, p. 50, pl. 1, figs. 3-9.-1965. Monotis (Entomonotis) ochotica eurachis (Teller): Tamura, p. 51, pl. 1, figs. 14, 15, pl. 2, fig. 1.-1965. Monotis (Entomonotis) ochotica sparsicosta (Teller): Tamura, p. 51, pl. 1, fig. 13.-1965. Monotis (Entomonotis) ambigua (Teller): Tamura, p. 51, pl. 2, figs. 7, 8. -1965. Monotis (Entomonotis) pachypleura (Teller): Tamura, p. 52, pl. 2, figs. 4-6.
Age and distribution. —Norian. Kochigatani group (upper part) in Sakawa, Sakuradani, Miyamadani (Kuriki) and Ome areas, Saragai group in Shizukawa and Kesennuma areas, Nariwa group in Nariwa area, and Myogatani formation in Ibuki area. This species has been known also from east Siberia, Canada, New Zealand, New Caledonia and many other areas in circum-Pacific region.
Remarks. —The infraspecific classification of Monotis ochotica complex is one of the most interesting but troublesome problems in the systematics of Japanese Mesozoic Bivalvia. Teller in Mojsisovics (1886) proposed a number ofvarietal names under "Psendomonotis" ochotica on the basis of Siberian specimens, namely, densistriata, enrachis, pachypleura, ambigua, sparsicostata, etc. Many subsequent authors used those names in the classification of Japanese materials, sometimes as subspecific or even specific, merely on the basis of morphological resemblance between individuals. In order to recognize the taxonomic validity of those varietal names further studies are needed especially on the intra- and interpopulational variation as well as the stratigraphic and geographic distribution. Since Kiparisova et al. (1966) examined many specimens from the type area and still regarded those names as infrasubspecific, almost all the names of this complex given to Japanese materials are tentatively treated as synonymous.

Monotis (Entomonotis) sublaevis (Teller)
1963. Monotis (Entomonotis) sublaevis (Teller): Nakazawa, p. 49, pl. 1, figs. 7, 8.
Age and distribution. —Norian. Nariwa group in Nariwa area. This species has been known from east Siberia.

Monotis (Entomonotis) subcycloidea (Kobayashi)
1935. Pseudomonotis subcycloidea Kobayashi, p. 29, pl. 7, fig. 1.
Type. —Holotype by monotypy (UMUT? not registered) from Kamosho, Asa, Yamaguchi Pref.
Age and distribution. —Norian. Kamosho formation in Asa area.

Monotis (Entomonotis) tenuicostata (Kobayashi and Ichikawa)
1949c. Entomonotis tenuicostata Kobayashi and Ichikawa, p. 259, pl. 9, figs. 6, 7.-1949c. Entowonotis tenuicostata var. mabara Kobayashi and Ichikawa, p. 260, pl. 9, fig. 8.-compare 1963. Monotis (Entomonotis) aff. tenuicostata Kobayashi and Ichikawa: Nakazawa, p. 50, pl. 1, figs. 11-14.-1965. Monotis (Entomonotis) tenuicostata Kobayashi and Ichikawa: Tamura, p. 53, pl. 2, figs. 16-22.
Type. —Holotype (UMUT MM5276) from Kasayadani, Sakawa, Kochi Pref.
Age and distribution. —Norian. Kochigatani group (upper part) in Sakawa, Miyamadani (Kuriki) and Sakamoto area.

Monotis (Entomonotis) iwaiensis (Ichikawa)
1951. Entomonotis iwaiensis Ichikawa, p. 46, text-figs, 1, 2.-compare 1964a. Monotis (Entomonotis) sp. aff. iwaiensis Ichikawa: Nakazawa, p. 33, pl. 4, figs. 9-11.
Type. —Holotype (UMUT MM5369) from M-valley (Iwai), Hinode, Tokyo Pref.
Age and distribution. —Norian. Kochigatani group (upper part) in Itsukaichi area.

Monotis (Entomonotis) multistriata (Kobayashi and Ichikawa)
1949c. Entomonotis multistriata Kobayashi and Ichikawa, p. 255, pl. 9, figs. 11, 14.-1965. Monotis (Entomonotis) multistriata Kobayashi and Ichikawa: Tamura, p. 52, pl. 2, figs. 9-12.
Type. —Holotype (UMUT MM5273) from Umenokidani, Sakawa, Kochi Pref.
Age and distribution. —Norian. Kochigatani group (upper part) in Sakawa, Sakuradani and Miyamadani (Kuriki) areas.

Monotis (Entomonotis) zabaikalica (Kiparisova)
1939. Entomonotis kurosawai Sakaguti, p. 229, pl. 15, figs. 1-6.-1949c. Entomonotis zabaikalica (Kiparisova): Kobayashi and Ichikawa, p. 257, pl. 10, figs. 12-18.-1949c. Entomonotis zabaikalica var. intermedia Kobayashi and Ichikawa, p. 258, pl. 10, figs. 19, 20.-1954c. Entomonotis zabaikalica (Kiparisova): Ichikawa, p. 51.-1954c. Entomonotis zabaikalica var. intermedia Kobayashi and Ichikawa: Ichikawa, p. 52.-1965, Monotis (Entomonotis) zabaikalica (Kiparisova): Tamura, p. 52, pl. 2, figs. 2, 3, 23.
Type. —Holotype of Entomonotis kurosawai from northeast of Hosoura, Utatsu, Miyagi Pref. Holotype of Entomonotis zabaikalica var. intermedia (UMUT MM5260) from Inotani, Sakawa, Kochi Pref.
Age and distribution. —Norian. Kochigatani group (upper part) in Sakawa, Sakuradani and Miyamadani (Kuriki) areas, and Saragai group in Shizukawa area. This species is widely distributed in east Siberia.

Monotis (Entomonotis) mukaihatensis Hase
1961. Monotis (Entomonotis) mukaihatensis Hase, p. 83, pl. 12, figs. 12-18.
Type. —Holotype (IGSH HA311) from Mukaihata, Miwa, Yamaguchi Pref.
Age and distribution. —Norian. Kuga group in Miwa area.
Remarks. —This species is possibly conspecific with Monotis (Entomonotis) zabaikalica.

Otapiria dubia (Ichikawa)
1954c. Pleuromysidia dubia Ichikawa, p. 52, pl. 1, figs. 13, 14, pl. 2, figs. l-5.-1959b. Pleuromysidia dubia Ichikawa: Tamura, p. 222, pl. 2, figs. 25, 26.
Type. —Holotype (UMUT MM5475) from Fujinohira, Kaminaka, Tokushima Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakuradani and Sakamoto areas.

Otapiria kanmerai (Tamura)
1959b. "Pleuromysidia" kanmerai Tamura, p. 222, pl. 2, fig. 27.
Type. —Holotype (GK F319) from Mameguri, Sakamoto, Kumamoto Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakamoto area.

Entolium sp. cf. E. discites (Schlotheim)
1961. Entolium cf. discites (Schlotheim): Nakazawa, p. 254, pl. 12, figs. 1-6,-1963. Entolium discites (Schlotheim): Kambe, p. 45, pl. 5, figs. 12, 13.
Age and distribution. —Skytian. Yakuno group (Oro formation) and Shidaka group in Maizuru zone, and Kamura formation in Takachiho area.

Entolium sp. cf. E. microtis (Bittner)
1961. Entolium cf. microtis (Bittner): Nakazawa, p. 255, pl. 12, fig. 7.-l964b. Entolium sp. cf. microtis (Bittner): Nakazawa, p. 14, pl. 1, figs. 7, 8.
Age and distribution. —Skytian-Anisian. Yakuno group (Hirobatake and Oro formations) in Maizuru zone, and unnamed strata in Uonashi area.

Entolium sp. cf. E. calvum (Goldfuss)
1959h. Entolium cf. calvum (Goldfuss): Hayami, p. 57, pl. 6, figs. 6-9.
Age and distribution. —Sinemurian. Toyora group (Higashinagano formation) in Toyoda area.

Entolium sp. cf. E. lunare (Roemer)
1959h. Entolium cf. lunare (Roemer): Hayami, p. 59, pl. 6, fig. 11.
Age and distribution. —Sinemurian. Toyora group (Higashinagano formation) in Toyoda area.

Entolium sp. cf. E. disciforme (Schubler)
1959c. Entolium cf. disciforme (Schübler): Hayami, p. 63, pl. 5, fig. 19.
Age and distribution. —Bajocian. Hashiura group (Aratozaki formation) in Shizukawa area.

Entolium inequivalve Hayami [Pl. 3, Fig. 2]
1959g. Entolium inequivalve Hayami, p. 154, text-fig., pl. 13, figs. 3-8.
Type. —Holotype (UMUT MM3166) from Mitarai, Shokawa, Gifu Pref.
Age and distribution. —Callovian. Tetori group (Mitarai formation) in Makito area.

1951. Entolium japonicum Kurata and Kimura, in Kimura, p. 345, pl. 1, figs. 16, 17.-1960d. Entolium japonicum Kurata and Kimura: Tamura, p. 236.
Type. —Holotype (UMUT MM7102) from Mimikire, Sakawa, Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa area.

Entolium yatsujiense Kurata and Kimura
1951. Entolium yatsujiense Kurata and Kimura, in Kimura, p. 346, pl. 1, fig. 18.-1959d. Entolium yatsujiense Kurata and Kimura: Tamura, p. 60, pl. 6, fig. 30.-1959f. Entolium yatsujiense Kurata and Kimura: Tamura, p. 176, pl. 19, fig. 41.-1960d. Entolium yatsu-jiense Kurata and Kimura: Tamura, p. 236.
Type. —Holotype (UMUT MM7105) from Yatsuji, Sakawa, Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa, Sakamoto and Tano-ura areas, and Soma group (Nakanosawa formation) in Soma area.

Entolium kimurai Tamura
1959d. Entolium kimurai Tamura, p. 60, pl. 6, figs. 23-29.-1959f. Entolium kimurai Tamura: Tamura, p. 176, pl. 19, fig. 27.-1960d. Entolium kimurai Tamura: Tamura, p. 236.-1960. Entolium kimurai Tamura: Hayami, Sugita and Nagumom, p. 93, pl. 8, fig. 14.
Type. —Holotype (UMUT MM3041) from Tsurubami, Sakamoto, Kumamoto Pref.
Age and distribution. —Upper Jurassic-Berriassian. Torinosu group in Sakamoto, Saka-wa, Sakuradani area, Soma group (Koyamada formation) in Soma area, and Shishiori group (Kogoshio formation) in Oshima area.

Entolium sanchuense Hayami
1965a. Entolium sanchuense Hayami, p. 315, pl. 45, figs. 12, 13, pl. 52, fig. 5.
Type. —Holotype (GK H6291) from south of Kagahara, Nakazato, Gumma Pref.
Age and distribution. —Upper Neocomian-Aptian. Ishido formation in Sanchu area.

Entolium? yatsushiroense Hayami
1965a. Entolium (?) yatsushiroense Hayami, p. 316, pl. 48, fig. 6.
Type. —Holotype (GK H6294) from Shimofukami, Sakamoto, Kumamoto Pref.
Age and distribution. —Albian. Yatsushiro formation in Sakamoto area.

Entolium sp. cf. E. obovatum (Stoliczka)
1928. Pecten {Syncyclonema) cf. obovatus Stoliczka: Yabe and Nagao, p. 87, pl. 17, figs. 3-6.-1938. Pecten (Syncyclonema?) aff. obovatus Stoliczka: Nagao, p. 128, pl, 16, figs. 1,2.
Age and distribution. —enomanian-Turonian. Middle Yezo group in Ikushumbetsu area.

Somapecten kamimanensis Kimura [Pl. 3, Figs. 3, 4]
1951. Somapecten kamimanensis Kimura, p. 347, pl. 1, figs. 19, 20.-1959d. Somapecten kamimanensis Kimura: Tamura, p. 62, text-fig. 3, pl. 6, figs. 50-55.-1959f. Somapecten kamimanensis Kimura: Tamura, p. 176, pl. 19, fig. 29.-1960d. Somapecten kamimanensis Kimura: Tamura, p. 237.
Type. —Holotype (UMUT MM7119) from Yasukurazawa, Kashima, Fukushima Pref.
Age and distribution. —Upper Jurassic (especially Kimmeridgian). Soma group (Nakanosawa formation) in Soma area, and Torinosu group in Sakamoto, Sakawa and Sakura dani areas.

Tosapecten suzukii suzukii (Kobayashi) [Pl 3, Fig. 7]
1931. Pecten (Velopecten} sussukii Kobayashi, p. 258, pl. 25, figs. 16-18.-1935. Pecten fujimotoi Kobayashi, p. 31, pl. 7, figs. 8, 9.-1949a. Tosapecten suzukii (Kobayashi): Kobayashi and Ichikawa, p. 167, pl. 5, figs. 9-12.-1949a. Tosapecten suzukii forma hirogariformis Kobayashi and Ichikawa, p. 168, pl. 5, fig. 13.-1949a. Tosapecten suzukii forma regularis Kobayashi and Ichikawa, p. 168, pl. 5, fig. 14.-1949a. Tosapecten suzukii var. fujimotoi (Kobayashi): Kobayashi and Ichikawa, p. 169, pl. 5, fig. 16.-1949a. Tosapecten suzukii var. paudcostatus Kobayashi and Ichikawa, p. 169, pl. 5, fig. 16.-1949a. Tosapecten suzukii var. inflatus Kobayashi and Ichikawa, p. 169, pl, 5, figs. 17, 18. -compare 1952. Tosapecten sp. cf. suzukii (Kobayashi): Nakazawa, p. 101, pl. 9, fig. 1.-1954d. Tosapecten suzukii (Kobayashi): Ichikawa, p. 54, pl. 3, figs. 4, 5.-1959a. Tosapecten suzukii (Kobayashi): Tamura, p. 222, pl. 2, figs. 16, 17.
Type. —Holotype (UMUT MM5029) from Shimoyama, Sakawa, Kochi Pref. Syntype of Pecten fujimotoi (UMUT MM5032) from the same locality and Kamosho, Asa, Yamaguchi Pref. Holotype of Tosapecten suzukii var. paudcostatus (UMUT 5202) from Tokombo, Sakawa, Kochi Pref. Holotype of Tosapecten suzukii var. inflatus (UMUT MM5203) from Kuromagari, Sakawa, Kochi Pref.
Age and distribution. —Carnian-Norian. Kochigatani group (lower part) in Sakawa, Sakuradani and Tanoura areas, and Kamosho formation in Asa area. This subspecies has been reported also from eastern Siberia.

Tosapecten suzuldi okadai Nakazawa
1952. Tosapecten okadai Nakazawa, p. 100, pl. 7, figs. 3, 4.-1960a. Tosapecten suzukii okadai Nakazawa: Tokuyama, p. 29, text-figs. 2-7, pl. 4, figs. 15-17.
Type. —Holotype (UK JM10009) from Nishimitsumatsu, Takahama, Fukui Pref.
Age and distribution. —Carnian-(?)Norian. Nabae group (N3 formation) in Maizuru zone, and Mine group (Also formation) in Mine area.

Tosapecten suzukii nabaensis Nakazawa
1952. Tosapecten nabaensis Nakazawa, p. 98, pl. 8, figs. 1, 2, 5.-1952. Tosapecten nabaensis forma distincticostatus Nakazawa, p. 100, pl. 8, figs. 6-8.-compare 1963. Tosapecten cf. suzukii nabaensis Nakazawa: Nakazawa, p. 55, pl. 2, figs. 15, 16.
Type. —Holotype (UK JM10002a) from Nabae, Takahama, Fukui Pref.
Age and distribution. —Carnian. Nabae group (N3 formation) in Maizuru zone.

Tosapecten pseudohiemalis Kobayashi and Ichikawa
1949a. Tosapecten pseudohiemalis Kobayashi and Ichikawa, p. 169, pl. 5, fig. 19.-1949a. Tosapecten pseudohiemalis var. mabarus Kobayashi and Ichikawa, p. 170, pl. 5, fig. 20.-1959b. Tosapecten pseudohiemalis Kobayashi and Ichikawa: Tamura, p. 223, pl. 2, figs. 18-20.
Type. —Holotype (UMUT MM5204) from Umenokidani, Sakawa, Kochi Pref. Holotype of Tosapecten pseudohiemalis var. mabarus (UMUT MM5205) from Otago, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa and Sakamoto areas. This species is also known from eastern Siberia.

Tosapecten teradensis Nakazawa
1952. Tosapecten teradensis Nakazawa, p. 100, pl. 7, figs. 7-9.
Type. —Holotype (UK JM1001b) from Terada, Maizuru, Kyoto Pref.
Age and distribution. —Carnian. Nabae group (N3 formation) in Maizuru zone.

Neithea (Neithea) atava (Römer)
1965a. Neithea (Neithea) kanmerai Hayami, p. 305, text-fig. 4, pl. 43, figs. 1-5, pl. 52, fig. 3.-1973. Neithea (Neithea) atava (Römer): Dhondt, p. 41.
Type. —Holotype of Neithea (Neithea) kanmerai (GK H6132) from Kohara, Toyo, Kumamoto Pref.
Age and distribution. —Upper Neocomian-Aptian. Hinagu formation in Sakamoto area, Arita formation in Yuasa area, Hanoura formation in Katsuuragawa area and Ishido formation in Sandhu area. This species is widely distributed in the Neocomian Aptian (particularly Hauterivian and Barremian) of Germany, France and Switzerland and also known from Tanzania and Trinidad.
Remarks. —As noted before (Hayami, 1965a, p. 308), there were some different opinions among European authors about the actual nature of Pecten atavus Römer, 1839. In 1965, I followed Woods' (1902) interpretation in which this specific name should be applied for another unrelated small species with highly unequal auricles [now regarded as Neithea (Neithella) notabilis (Munster)], and proposed a new specific name, Neithea (Neithea) kanmerai, on the basis of the Japanese large specimens in question. As pointed out by Dhondt (1973), however, Woods' interpretation of Pecten atavus is certainly erroneous, and N. (N.) kanmerai is scarcely different from the European specimens of true N. (N.) atava in every essential character. Although Romer's original specimen has not been observed by any recent authors, I agree here with Dhondt in regarding N. (N.) kanmerai as synonymous with N. (N.) atava.

Neithea (Neithea) ficalhoi (Choffat)
1934, Pecten (Neithea) morrisi Pictet and Renevier: Nagao, p. 206, pl. 26, figs. 2-6.1965a. Neithea {Neithea) ficalhoi (Choffat): Hayami, p. 302, text-fig. 4, pi. 42, figs. 5-16.-1973. Neithea (Neithea) alpina (d'Orbigny): Dhondt, p. 15 (pars).
Age and distribution. —Aptian. Miyako group (Tanohata and Hiraiga formation) in Tanohata and Miyako areas. This species was originally described from the Aptian (?) of Angola.
Remarks. —It may be possible, as treated by Dhondt (1973), to regard Janira ficalhoi Choffat in Choffat, and Loriol, 1888, as a junior synonym of Janira alpina d'Orbigny, 1847, because the mode of radial ribbing is quite similar, although the occurence of the latter species is almost restricted to the Upper Cretaceous in western Europe. Further comparison among the African, European and Japanese specimens seems to be necessary to clarify the evolutionary relationship.

Neithea (Neithea) syriaca (Conrad)
1957b. Pecten (Neithea) cf. morrisi (Pictet and Renevier): Amano, p. 88, pl. 1, figs. 17, 18, 20-25, 27-29.-1965a. Neithea {Neithea) amanoi Hayami, p. 299, text-fig. 4, pl. 41, figs. 8-10, pl. 42, figs. 1-4.-1972. Neithea (Neithea) amanoi Hayami: Shikama and Suzuki, pl. 4, fig. 15.-1973. Neithea (Neithea) syriaca (Conrad): Dhondt, p. 37.
Type. —Holotype of Neithea (Neithea) amanoi (GK H6267) from Hagino, Kahoku, Kochi Pref.
Age and distribution. —Aptian. Hagino formation in Monobegawa area and Choshi formation in Choshi area. This species is widely distributed in the Aptian and Albian of Lebanon, Angola, Madagascar and western Europe.
Remarks. —Dhondt (1973, p. 37) regarded Amano's specimens as belonging to Neithea (Neithea) syriaca (Conrad, 1852), whereas Neithea (Neithea) amanoi Hayami, 1965, which was based on the material from the same locality as Amano's, was compared by her (p. 29) with Neithea (Neithea) coquandi (Peron, 1877) from the Albian-Cenomanian of western Europe. So far as I observed many specimens of N. (N.) syriaca [=N. (N.) morrisi] from Lebanon and western Europe, no essential difference could be found between N. (N.') amanoi and that species. Although one of the four intercalary secondary ribs becomes more frequently indistinct in the Japanese form, it may be assigned to geographic variation. This form clearly differs from N. (N.) coquandi in the more uniform and generally weaker ribs and much smaller size.

Neithea (Neithea) matsumotoi Hayami
1965a. Neithea (Neithea) matsumotoi Hayami, p. 297, text-fig. 4, pl. 41, figs. 1-7.-com-pare 1965. Neithea sp.: Matsumoto, Hayami and Hashimoto, p. 10, pl. 1, fig. 13.-11967. Neithea (Neithea) matsumotoi Hayami: Hayami and Kawasawa, p. 76, pl. 9, fig. 2.
Type. —Holotype (GK H6126) from Miyaji, Yatsushiro, Kumamoto Pref.
Age and distribution. —Albian. Yatsushiro formation in Yatsushiro area, Haidateyama formation in Nozu area and Shimantogawa group (Doganaro formation) in Susaki area.
Remarks. —As discussed by Dhondt (1973, p. 46), the present species is apparently similar to Neithea (Neithea) sexcostata (Woodward, 1833) from the Cenomanian-Maesttrichtian of northwest Europe in the surface ornamentation of right valve. So far as I examined many specimens of N. (N.) sexcostata from the Chalk of England and Scania, however, N. (N.) matsumotoi is different from the European species in the larger apical angle, weaker convexity of right valve and weaker radial ribs on the left valve.

Neithea (Neithea) nipponica Hayami
1934. Pecten (Neithea) sp.: Nagao, p. 209, pl. 29, figs. 8, 9.-1965a. Neithea (Neithea) nipponica Hayami, p. 296, text-fig. 4, pl. 40, figs. 1-6, pl. 52, figs. 1, 2.-1973. Neithea (Neithea) quinquecostata (Sowerby): Dhondt, p. 32 (pars).
Type. —Holotype (GK H6263) from Raga, Tanohata, Iwate Pref.
Age and distribution. —Aptian-Albian. Miyako group (Aketo formation and upper part of Hiraiga formation) in Tanohata area.
Remarks. —Dhondt (1973, p. 34) discussed the taxonomic position of this species and regarded it as synonymous with Neithea (Neithea) quinqnecostata (Sowerby, 1814). As the result of my observation of a number of specimens (including the lectotype) of the European species from the Cenomanian of England, it was found that N. (N.) nipponica is characterized by the more rounded (less polygonal) outline of left valve, less angulated anterior and posterior extremity of right valve and thinner test than N. (N.) quinquecostata. It is unlikely they are conspecific. However, it is interesting to see that the difference is not so striking between our specimens and some of the material from the Aptian and Albian of England preserved under the name of N. (N.) quinquecostata in the British Museum (Nat. Hist.).

Neithea (Neithea) kochiensis Hayami
1967. Neithea (Neithella?) kochiensis Hayami, in Hayami and Kawasawa, p. 76, pl. 9, fig. 1.
Type. —Holotype (GK H6808) from Kakureyashiki, Susaki, Kochi Pref.
Age and distribution. —Albian (or thereabout). Shimantogawa group (Doganaro formation) in Susaki area.

Neithea (Neithella) notabilis (Münster in Goldfuss)
1926. Pecten (Neithea) cf. atavus Römer: Yabe, Nagao and Shimizu, p. 61, pl. 13, figs. 18, 19.-1965a. Neithea (Neithella) sp. cf. N. (N.) atava (Römer): Hayami, p. 307, text-fig. 4, pl. 44, figs. 1-4, pl. 52, fig. 4.-1972. Neithea (Neithella) sp. cf. N. (N.) atava Römer: Shikama and Suzuki, pl. 4, fig. 14. -1973. Neithea (Neithella) notabilis (Münster in Goldfuss): Dhondt, p. 67.
Age and distribution. —Upper Neocomian-Aptian. Ishido formation in Sanchu area, Miyako group (Hiraiga formation) in Tanohata area and Choshi formation in Choshi area.
Remarks. —Yabe and Nagao in Yabe, Nagao and Shimizu (1926) and Hayami (1965a) followed Woods' misinterpretation of Pecten atavus Römer, 1839. Here I agree with Dhondt (1973, p. 67) in regarding these Japanese specimens as referable to Neithea (Neithella) notabilis instead of N. (Neithea) atava.

Neithea? aketoensis Hayami
1965a. Neithea (s. l.) aketoensis Hayami, p. 309, pl. 43, fig. 6.
Type. —Holotype (GK H6284) from northeast of Raga, Tanohata, Iwate Pref.
Age and distribution. —Albian. Miyako group (Aketo formation) in Tanohata area.

Neithea sp.
1957b. Pecten (Neithea) aff. quadricostatus Sowerby: Amano, p. 89, pl. 2, fig. 1.
Age and distribution. —Aptian. Hagino formation in Monobegawa area.

Chlamys mojsisovicsi Kobayashi and Ichikawa [Pl. 3, Fig. 8]
1949a. Chlamys mojsisovicsi Kobayashi and Ichihawa, p. 165, pl. 5, figs. 1-5.-1949a. Chlamys mojsisovicsi var. toyamai Kobayashi and Ichikawa, p. 166, pl. 5, figs. 6-8.-1952. Chlamys mojsisovicsi Kobayashi and Ichikawa; Nakazawa, p. 101, pl. 9, figs. 3-6.-1954d. Chlamys mojsisovicsi Kobayashi and Ichikawa: Ichikawa, p. 53, pl. 3, figs. 1-3.-1960a. Chlamys mojsisovicsi Kobayashi and Ichikawa: Tokuyama, p. 31, pl. 4, figs. 11-13.
Type. —Holotype (UMUT MM5187) from Kasayadani, Sakawa, Kochi Pref. Holotype of Chlamys mojsisovicsi var. toyamai (UMUT MM5191) from the same locality.
Age and distribution. —Carnian-(?) Norian. Kochigatani group (lower part) in Sakawa and Sakuradani area, Nabae group (N3 formation in Maizuru zone, and Mine group (Aso formation) in Mine area. This species occurs also in east Siberia.

Chlamys textoria (Schlotheim)
1959h. Chlamys textoria (Schlotheim): Hayami, p. 52, pl. 5, figs. 23-26.
Age and distribution. —Sinemurian. Toyora group (Higashinagano formation) in Toyoda area. This species seems to be cosmopolitan.

Chlamys kurumensis Kobayashi and Hayami
1957e. Chlamys kurumensis Kobayashi and Hayami, in Hayami, p. 119, pl. 20, fig. 1.compare 1957e. Chlamys cf. kurumensis Kobayashi and Hayami: Hayami, p. 120, pl. 20, ng. 2.
Type. —Holotype (UMUT MM2697) from Kamikawara, Otari, Nagano Pref.
Age and distribution. —Lower Jurassic (precisely unknown) Kuruma group in Otari area.

Chlamys kotakiensis Takai and Hayami
1957e. Chlamys kotakiensis Takai and Hayami, in Hayami, p. 121, pl. 20, figs. 3-5.
Type. —Holotype (UMUT MM2700) from Ohishi, Itoigawa (Kotaki), Niigata Pref.
Age and distribution. —Lower Jurassic (not younger than Pliensbachian). Kuruma group (Kitamatadani formation) in Kotaki and Asahi areas.

Chlamys awazuensis Hayami
1961b. Chlamys awazuensis Hayami, p. 120, pl. 16, fig. 6.
Type. —Holotype (UMUT MM3681) from Awazu, Soma, Fukushima Pref.
Age and distribution. —Bajocian (or Bathonian). Soma group (Awazu formation) in Soma area.

Chlamys kobayashii Hayami
1959d. Chlamys kobayashii Hayami, p. 133, pl. 14, figs. 1, 2.
Type. —Holotype (UMUT MM3124) from Tsukinoura, Ishinomaki, Miyagi Pref.
Age and distribution. —Bajocian. Ojika group (Tsukinoura formation) in Ojika area, and Karakuwa group (Kosaba formation) in Karakuwa area.

Chlamys mitaraiensis Hayami
1959g. Chlamys mitaraiensis Hayami, p. 151, pl. 12, figs. 17-20.
Type. —Holotype (UMUT MM3160) from Mitarai, Shokawa, Gifu Pref.
Age and distribution. —Callovian. Tetori group (Mitarai formation) in Makito area.

Chlamys iboibo Kurata and Kimura
1951. Chlamys iboibo Kurata and Kimura, in Kimura, p. 339, pl. 1, figs. 2-4. -1959d. Chlamys (Chlamys) iboibo Kurata and Kimura: Tamura, p. 57, pl. 6, fig. 38.-1960d. Chlamys iboibo Kurata and Kimura: Tamura, p. 234.
Type. —Holotype (UMUT MM7091) from Mimikire, Sakawa, Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa and Tanoura areas.

Chlamys camptonectoides Tamura
1959f. Chlamys camptonectoides Tamura, p. 175, pl. 19, figs. 16, 17.
Type. —Holotype (UMUT MM3212) from Koike, Kashima, Fukushima Pref.
Age and distribution. —Kimmeridgian. Soma group (Nakanosawa formation) in Soma area.

Chlamys robinaldina (d'Orbigny)
1965a. Chlamys robinaldina (d'Orbigny): Hayami, p. 310, pl, 44, figs. 5-7.
Age and distribution. —Aptian. Miyako group (Hiraiga formation) in Tanohata area.
This species has been known from western Europe.

Chlamys sp. cf. C. subacuta (Lamarck)
1965a. Chlamys sp. cf. C. subacuta (Lamarck): Hayami, p. 312, pl. 45, fig. 1.
Age and distribution. —Albian. Miyako group (Aketo formation) in Tanohata area.

Chlamys shikokuensis Amano
1957b. Chlamys shikokuensis Amano, p. 90, pl. 2, fig. 2.-1965a. Chlamys (?) shikokuensis Amano: Hayami, p. 312, pl. 44, fig. 8.
Type. —Holotype (UMUT KML0019) from Hagino, Kahoku, Kochi Pref.
Age and distribution. —Upper Neocomian-Aptian. Hagino formation in Monobegawa area, and Lower Monobegawa group in Nangoku area.

Chlamys? sp. cf. C? kryshtofowichi (Kiparisova)
1963. Chlamys (?) kryshtofowichi (Kiparisova): Kambe, p. 46, pl. 5, figs. 15, 16.
Age and distribution. —Skytian. Kamura formation in Takachiho area.

Aequipecten? toyorensis Hayami
1959h. "Aequipecten''' toyorensis Hayami, p. 55, pl, 6, figs. 1-5.
Type. —Holotype (UMUT MM3384) from Higashinagano, Toyoda, Yamagucbi Pref.
Age and distribution. —Sinemurian. Toyora group (Higashinagano formation) in Toyoda area.

Aequipecten? vulgaris Kimura
1951. Aequipecten vulgaris Kimura, p. 342, pl, 1, figs. 5, 6.-1959d. "Aequipecten" vulgaris Kimura: Tamura, p. 58, pl0. 6, figs. 40, 41.-1959f. "Aequipecten" vulgaris Kimura; Tamura, p. 175, pl. 19, fig. 22.-1960d. "Aequipecten" vulgaris Kimura: Tamura, p, 235.
Type. —Holotype (UMUT MM7114) from Arinoki, Sakawa, Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa, Sakamoto and Sakuradani areas, and Soma group (Nakanosawa formation) in Soma area.

Aequipecten ? kotsubu (Kimura)
1951. Neithea kotsubu Kimura, p. 343, pl. 1, figs. 8, 9.-1959d. "Aequipecten" kotsubu (Kimura): Tamura, p. 58, pl. 6, figs. 33, 34.-1959f. "Aequipecten" kotsubu (Kimura): Tamura, p. 175.-1960d. "Aequipecten" kotsubu (Kimura): Tamura, p. 235.
Type. —Holotype (UMUT MM7109) from Nagatake, Kamo, Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa, Sakamoto and Sakuradani areas, and Soma group (Nakanosawa formation) in Soma area.

* As the result of Dhondt's (1973) important systematic study and also my own observation on many European specimens of Neithea at the British Museum (Nat. Hist.) and some other institutions in western Europe, it becomes clear that some of the specific names applied before (Hayami, 1965a) for Japanese sepcimens must be revised. Since the circumstances are somewhat complicated, only the revised names are given in this catalogue with brief notes for the reason of alteration, and the full account will be described and discussed on another occasion. Particular thanks are due to Dr. N. J. Morris of the British Museum (Nat. Hist.) and Dr. Annie Dhondt of the Royal Institute of Natural Science of Belgium for this revision.[return to the text]