Promyalina minuta Nakazawa
1961. Promyalina minuta Nakazawa, p. 265, pl. 13, fig. 10.
Type. —Holotype (UK JM10707) from Katsuradani (Hirobatake), Oe, Kyoto Pref.
Age and distribution. —Skytian. Yakuno group (Hirobatake formation) in Maizuru zone.

Pteria ussurica yabei Nakazawa
1954. Gervilleia cf. exporrecta (Lepsius): Ozaki and Shikama, p. 44, figs. 1-3.-1956. Bakevellia ussurica var. rostrata Yabe, p. 288, pl. 17, figs. 1-9 (non fig. 10).-1959. Pteria ussurica yabei Nakazawa, p. 198, text-fig. 2, pl. 3, figs. 1-3.-1963. Pteria ussurica (Kipari-sova) yabei Nakazawa: Kambe, p. 42, text-fig. 7, pl. 4, figs. 17-30, pl. 5, figs. 1-8.-1971. Pteria ussurica yabei'Nakazawa: Nakazawa, p. 114, pl. 23, figs. 1, 2.
Type. —Holotype (UK JM10628a) from Shionosawa, Ueno, Gumma Pref.
Age and distribution. —Skytian. Shionosawa limestone in Sanchu area, Kamura formation in Takachiho area, and Kurotaki formation in Nangoku area.

Pteria? mugikawensis Tokuyama
1959b. "Pteria" mugikawensis Tokuyama, p. 11, pl. 1, fig. 18.
Type. —Holotype (UMUT MM4515) from north of Omine station, Mine, Yamaguchi Pref.
Age and distribution. —Carnian, Mine group (Hirabara formation) in Mine area.

Pteria sp. aff. P. murchisoni (Geinitz)
1961. Pteria aff. murchisoni (Geinitz): Nakazawa, p. 264, pl. 13, figs. 8, 9.
Age and distribution. —Skytian. Yakuno group (Ichio formation) in Maizuru zone.

Pteria kitakamiensis Hayami
1904. Gervillia trigona Yokoyama, p. 12, pl. 2, fig. 8 (non fig. 7).-1958a. Pteria (s. 1.)
kitakamiensis Hayami, p. 163, pl. 24, figs. 10, 11.
Type. —Holotype (UMUT MM2737) from Niranohama, Utatsu, Miyagi Pref.
Age and distribution. —Hettangian. Shizukawa group (Niranohama formation) in Shizu kawa area.

Pteria masatanii Tamura [Pl. 1, Fig. 14]
1960a. Pteria masatanii Tamura, p. 224, pl. 26, figs. 19, 20.
Type. —Holotype (UMUT MM3236) from Tatenosawa, Kashima, Fukushima Pref.
Age and distribution. —Kimmeridgian. Soma group (Nakanosawa formation) in Soma area.

Explanation of Plate 1 Fig. 1. Trigonucula sakawana Ichikawa: type-species of genus Trigonucula. Holotype (UMUT MM 5242), rubber cast from left external mould, ×2. Loc. Umenokidani, Sakawa (Carnian, Kochigatani group). Fig. 2. Solemya suprajurensis Hayami. Holotype (UMUT MM3138), internal mould of right valve, ×1. Loc. Mitarai, Makito (Callovian, Tetori group). Fig. 3, Parallelodon (Palaeocucullaea) monobensis Nakazawa: type-species of subgenus Palaeocucullaea. Rubber cast from left internal mould (UMUT MM4571), ×1. Loc. Hirabarazaka, Mine (Carnian, Mine group). Fig. 4. Parallelodon (Torinosucatella) kobayashii (Tamura): type-species of subgenus Torinosucatella. Rubber cast from left external mould (UMUT MM3207), ×1.5. Loc. Tatenosawa, Soma (Kimmeridgian, Soma group). Fig. 5. The same species. Left valve (UMUT MM3206), ×1.5. Loc. ditto. Fig. 6. Matsumotoa japonica Okada: type-species of genus Matsumotoa. Holotype (GK H6027), rubber cast from right internal mould, ×1. Loc. Tsuzumugi, Mifune (Cenomanian-Turonian, Mifune group). Fig. 7. The same species. Paratype (GK H6026), left valve, ×1.5. Loc. Kanayama, Masuki (Cenomanian-Turonian, Mifune group). Fig. 8. Glycymeris (Pseudoveletuceta) mifunensis Tashiro: type-species of subgenus Pseudoveletuceta. Holotype (KE 1774), rubber cast from right internal mould, ×1.5. Loc. Asanoyabu, Mifune (Cenomanian-Turonian, Mifune group). Fig. 9. Glycymeris (Hanaia) densilineata Nagao: type-species of subgenus Hanaia. Left valve (GK H6219), ×1.5. Loc. Haipe, Tanohata (Aptian, Miyako group). Fig. 10. The same species. Topotype (GK H6352), right valve, ×1.5. Loc. Hiraiga, Tanohata (Aptian, Miyako group). Fig. 11. Inoperna plicata (Sowerby). Right valve (UMUT MM3264), ×1. Loc. Yamashita, Soma (Kimmeridgian, Soma group). Fig. 12. Modiolus bakevelloides (Hayami). Holotype (UMUT MM2719), right valve, ×1. Loc. Niranohama, Shizukawa (Hettangian, Shizukawa group). Fig. 13. Pinna (Plesiopinna) airiniformis (Amano): type-species of subgenus Plesiopinna. Holotype (KU not registered), right valve, ×1. Loc. Shishijima (Albian?-Cenomanian, Gosyonoura group). Fig. 14. Pteria masatanii Tamura. Holotype (UMUT MM3236), left valve, ×1. Loc. Tatenosawa, Soma (Kimmeridgian, Soma group). Fig. 15. Pteroperna pauciradiata Tamura. Holotype (UMUT MM3246), left valve, ×1. Loc. Tatenosawa, Soma (Kimmeridgian, Soma group). Fig. 16. Somapteria koikensis Tamura: type-species of genus Somapteria. Holotype (UMUT MM3242), right valve, ×1.5. Loc. Koike, Soma (Kimmeridgian, Soma group).

Pteroperna lingulata Tamura
1960a. Pteroperna lingulata Tamura, p. 226, pl, 26, figs. 16-18.
Type. —Holotype (UMUT MM3248) from Tatenosawa, Kashima, Fukushima Pref.
Age and distribution. —Kimmeridgian. Soma group (Nakanosawa formation) in Soma area.

Pteroperna pauciradiata Tamura [Pl. 1, Fig. 15]
1960a. Pteroperna pauciradiata Tamura, p. 226, pl. 26, figs. 1, 2.
Type. —Holotype (UMUT MM3246) from Tatenosawa, Kashima, Fukushima Pref.
Age and distribution. —Kimmeridgian. Soma group (Nakanosawa formation) in Soma area.

Somapteria koikensis Tamura [Pl. 1, Fig. 16]
1960a. Somapteria koikensis Tamura, p. 225, text-figs. 1, 2, pl. 26, figs. 3-8.
Type. —Holotype (UMUT MM3242) from Koike, Kashima, Fukushima Pref.
Age and distribution. —Kimmeridgian. Soma group (Nakanosawa formation) in Soma area.

Pinctada (Eopinctada) matsumotoi Tamura [Pl. 2, Fig. 2]
1961. Pinctada (Eopinctada) matsumotoi Tamura, p. 150, text-fig. 2, pl. 22, figs. 1-4. Type. —Holotype (UMUT MM3704) from Kamiumeki, Mifune, Kumamoto Pref.
Age and distribution. —Cenomanian-Turonian. Mifune group in Mifune 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).

Pterinella shinoharai Hayami
[Pl. 2, Fig. 1]
1965a. Pterinella shinoharai Hayami, p. 265, text-fig. 2, pl. 31, figs. 1-3, pl. 32, figs. 1-6, pl. 33, figs. 1, 2, pl. 34, figs. 1, 2, pl. 35, figs. 1, 2.
Type. —Holotype (GK H6235) from Nekodani, Yatsushiro, Kumamoto Pref.
Age and distribution. —Kpper Neocomian-Albian. Yatsushiro formation in Yatsushiro area, Hanoura formation in Katsuuragawa area, and Arita formation in Yuasa area.

Bakevellia (Neobakevellia) rostrata Yabe
compare 1926. Gervilleia cf. exporrecta (Leps.): Matushita, p. 421, pl. 8, fig. 10,-1956. Bakevellia ussurica Kiparisova var. rostrata Yabe, p. 288, pl. 17, fig. 10 (non figs. 1-9).-1959. Bakevellia (Neobakevellia) rostrata Yabe: Nakazawa, p. 197, pl. 3, fig. 4.-compare 1971. Bakevellia (Neobakevellia) cf. rostrata Yabe: Nakazawa, p. 116, pl. 23, figs. 3-5.
Type. —Lectotype designated by Nakazawa (1959, p. 197) (Tokyo University of Educa tion, not registered) from Shionosawa, Ueno, Gumma Pref.
Age and distribution. —Skytian. Shionosawa limestone in Sanchu area.

Bakevellia (Neobakevellia) tsuzuradaniensis Nakazawa
1959. Bakevellia (Neobakevellia) tsuzuradaniensis Nakaza wa, p. 200, text-fig. 4, pl. 1, figs. 10-12.
Type. —Holotype (UK JM10527) from Okuyama, Oe, Kyoto Pref.
Age and distribution. —Skytian. Yakuno group (Narawara, Hirobatake and Honodani formations) in Maizuru zone.

Bakevellia (Neobakevellia) kambei kambei Nakazawa
1959. Bakevellia (Maizuria) kambei Nakazawa, p. 204, text-fig. 7, pl. 4, figs. 1-12.-compare 1959. Bakevellia (Maizuria) kambei n. subsp. ?: Nakazawa, p. 207, pl. 4, fig. 15.
Type. —Holotype (UK JM10582) from Hosokubi, Oya, Hyogo Pref.
Age and distribution. —Skytian (?). Miharaiyama group (Gannosudani formation) and Shidaka group in Maizuru zone. Some authors have regarded these formations as Upper Triassic.

Bakevellia (Neobakevellia) kambei dannensis Nakazawa
1959. Bakevellia (Maizurid) kambei dannensis Nakazawa, p. 206, pl. 2, figs. 13, 14.
Type. —Holotype (UK JM10607) from Dan, Aita, Okayama Pref.
Age and distribution. —Skytian. Fukumoto group in Maizuru zone (western part.).

Bakevellia (Neobakevellia) narawarensis Nakazawa
1959. Bakevellia (Maizwia) narawarensis Nakazawa, p. 207, pl. 2, figs, 16-21.
Type. —Holotype (UK JM10558a) from Okuyama, Oe, Kyoto Pref.
Age and distribution. —Skytian. Yakuno group (Narawara formation) in Maizuru zone.

Bakevellia (Neobakevellia) okuyamensis Nakazawa
1959. Bakevellia (Maizuria) okuyamensis Nakazawa, p. 202, text-figs. 5, 6, pl. 1, figs. 13- 21.-compare 1959. Bakevellia (Maizuria) cf. okuyamensis Nakazawa: Nakazawa, p. 203, pl. 1, figs. 22, 23.
Type. —Holotype (UK JM10530a) from Okuyama, Oe, Kyoto Pref.
Age and distribution. —Skytian. Yakuno group (Narawara, Hirobatake and Honodani formations) and Shidaka group in Maizuru zone.

Bakevellia (Neobakevellia) matsushitai Nakazawa
1954. Bakevellia matsushitai Nakazawa, p. 214, pl. 3, figs. 1-5, 8.-1954. Bakevellia cf. matsushitai Nakazawa: Nakazawa, p. 215, pl. 3, figs. 6, 7.
Type. —Holotype (UK JM 10060) from Kongoin, Maizuru, Kyoto Pref.
Age and distribution. —Nabae group (N2 formation) in Maizuru zone.

Bakevellia (Neobakevellia) monobensis Nakazawa
1954. Bakevellia monobensis Nakazawa, p. 217, pl. 4, figs. 5-9, pl. 5, figs. 1-2.
Type. —Holotype (UK JM10089a) from Monobe, Ayabe, Kyoto Pref.
Age and distribution. —Carnian. Nabae group (N3 formation) in Maizuru zone.

Bakevellia (Neobakevellia) oyogiensis Nakazawa
1954. Bakevellia oyogiensis Nakazawa, p. 216, pl. 3, fig. 9, pl. 4, figs. 1-4.
Type. —Holotype (UK JM10067) from Miuchi, Ayabe, Kyoto Pref.
Age and distribution. —Carnian. Nabae group (N2 and N3 formations) in Maizuru zone.

Bakevellia (Neobakevellia ?) araiensis (Ichikawa)
1954a. "Gervillia" araiensis Ichikawa, p. 51, pl. 7, fig. 14.-1954a. "Gervillia" cf. araiensis Ichikawa: Ichikawa, p. 52, pl. 7, fig. 15.
Type. —Holotype (UMUT MM5417) from Arai, Hinode, Tokyo Pref.
Age and distribution. —Triassic (precisely unknown). Arai formation in Itsukaichi area.

Bakevellia (Neobakevellia) trigona (Yokoyama)
[Pl. 2, Fig. 3]
1904. Gervillia trigona Yokoyama, p. 12, pl. 2, fig. 7 (non fig. 8).-1957a. Bakevellia trigona (Yokoyama): Hayami, p. 51, pl. 2, figs. 1-5.-compare 1959a. Bakevellia cf. trigona (Yokoyama): Hayami, p. 69, pl. 7, fig. 3.
Type. —Lectotype designated by Hayami (1957a, p. 51) (UMUT MM7175) from Hosoura, Shizukawa, Miyagi Pref.
Age and distribution. —Hettangian. Shizukawa group (Niranohama formation) in Shizukawa and Hashiura areas.

Bakevellia (Neobakevellia) magnissima Hayami
1957a. Bakevellia magnissima Hayami, p. 52, pl. 2, figs. 6-10, pl. 3, fig. 1.
Type. —Holotype (UMUT MM2655) from Shinatani, Omi (Agero), Niigata Pref.
Age and distribution. —Pliensbachian-Toarcian, Kuruma group (Shinatani fromation) in Omi area, Iwamuro formation in Katashina area, and Yamaoku formation in Osakabe area.

Bakevellia (Neobakevellia) otariensis Hayami
1957a. Bakevellia otariensis Hayami, p. 53, pl. 3, figs. 2-5.
Type. —Holotype (UMUT MM2660) from Kuruma, Otari, Nagano Pref.
Age and distribution. —Pliensbachian (or thereabout). Kuruma group (Tsuchizawa formation) in Otari area.

Bakevellia (Neobakevellia) negoyensis Hayami
1957a. Bakevellia negoyensis Hayami, p. 54, pl. 3, fig. 6.
Type. —Holotype (UMUT MM2664) from Aisawadani, Omi. Niigata Pref.
Age and distribution. —Pliensbachian (or thereabout). Kuruma group (Negoya formation) in Omi area.

Bakevellia (Neobakevellia) ohishiensis Hayami
1957a. Bakevellia ohishiensis Hayami, p. 56, pl. 3, figs. 11, 12.
Type. —Holotype (UMUT MM2667) from Ohishi, Itoigawa (Kotaki), Niigata Pref.
Age and distribution. —Lower Jurassic (Pliensbachian or earlier). Kuruma group (Kitamatadani formation) in Kotaki area.

Bakevellia (Neobakevellia ?) cassianelloides Kobayashi and Hayami
1957a. Bakevellia (s. 1.) cassianelloides Kobayashi and Hayami, in Hayami, p. 57, pl. 3, figs. 7-9.
Type. —Holotype (UMUT MM2669) form Kuruma, Otari, Nagano Pref.
Age and distribution. —Pliensbachian (or thereabout). Kuruma group (Tsuchizawa formation) in Otari area.

Bakevellia (Neobakevellia) shinanoensis (Yabe and Nagao)
1926. Gervillia shinanoensis Yabe and Nagao, in Yabe, Nagao and Shimizu, p. 59, pl. 14, figs. 17, 18. -1955. Bekevellia shinanoensis (Yabe and Nagao): Yamagiwa, p. 50, pl. 2, fig. 2.
Type. —Syntype (IGPS no. 22507) from Kagikake and Bomeki, Ohinata, Nagano Pref.
Age and distribution. —Neocomian. Shiroi formation (now regarded as the lower part of Ishido formation) in Sanchu area, and Ryoseki group in Shima area.

Bakevellia (Neobakevellia) ominensis Nakazawa and Murata
1966. Bakevellia (Neobakevellia) ominensis Nakazawa and Murata, p. 309, pl. 3, figs. 1-7.
Type. —Holotype (UK JM11131) from Obirakizawa, Omine, Iwate Pref.
Age and distribution. —Neocomian. Kamihei group in Kamaishi area.

Bakevellia (Neobakevellia ?) tadai Nakazawa and Murata
1966. Bakevellia (Neobakevellia?) tadai Nakazawa and Murata, p. 310, pl. 3, fig. 8.
Type. —Holotype (UK JM11142) from Obirakizawa, Omine, Iwate Pref.
Age and distribution. —Neocomian. Kamihei group in Kamaishi area.

Bakevellia (Bakevelloides) hekiensis (Kobayashi and Ichikawa) [Pl. 2, Fig. 4]
1952a. "Gervillia" hekiensis Kobayashi and Ichikawa, p. 76, pl. 2, figs. 4-6.-1954. Bakevellia hekiensis (Kobayashi and Ichikawa): Nakazawa, p. 218, pl. 5, figs. 3-8, pl. 6, figs. 1-3.-1957b. "Aguileria" hekiensis (Kobayashi and Ichikawa): Nakano, p. 64, pl. 9, figs. 2, 3.-1959a. Bakevelloides hekiensis (Kobayashi and Ichikawa): Tokuyama, p. 149, text-fig., pl. 16, figs. 1-7.
Type. —Holotype (UMUT MM5387) from Heki, Yakuno, Kyoto Pref.
Age and distribution. —Carnian. Heki formation and Nabae group (N3 formation) in Maizuru zone, Kyowa formation in Nariwa area, and Mine group (Hirabara formation) in Mine area.

Bakevellia (Bakevelloides) subhekiensis Nakazawa
1954. Bakevellia subhekiensis Nakazawa, p. 219, pl. 6, figs. 4-7.
Type. —Holotype (UK JM10108) from Nabae, Takahama, Fukui Pref.
Age and distribution. —Carnian. Nabae group (N1 formation) in Maizuru zone.

Bakevellia (Bakevelloides ?) saekii (Kobayashi and Ichikawa)
1952a. "Gervillia" saekii Kobayashi and Ichikawa, p. 75, pl. 2, fig. 3.-compare 1952b. "Gervillia" cf. saekii Kobayashi and Ichikawa: Kobayashi and Ichikawa, p. 267, pl. 10, figs. 9, 10.
Type. —Holotype (UMUT MM5379) from Keki, Yakuno, Kyoto Pref.
Age and distribution. —Carnian. Heki formationin Maizuru zone.

Bakevellia (Yoshimopsis) nagatoensis (Ohta) [Pl. 9, Fig. 2]
1939. Gervillia shinanoensis Yabe and Nagao: Kobayashi and Suzuki, p. 217, pl. 13, figs. 20-22, pl. 14, figs. 16-19,-1974. Bakevelloides (Yoshimopsis) nagatoensis Ohta, p. 81, text-figs. 1-4, pl. 1, figs. 1-11.
Type. —Holotype (GF Y423) from Yoshimo, Shimonoseki, Yamaguchi Pref.
Age and distribution. —Neocomian. Toyonishi group (Yoshimo formation) in Shimo noseki area, and Kawaguchi formation in Tanoura area.

Explanation of Plate 9 Fig. 1. Jupiteria (Ezonuculana) mactraeformis (Nagao): type-species of subgenus Ezonuculana. Left internal mould (OCU MM191), × 3. Loc. Kamatani, Izumi mountains (Campanian, Izumi group). Reproduced from Ichikawa and Maeda, 1958b, pl, 5, fig. 2a. Fig. 2. Bakevellia (Yoshimopsis) nagatoensis (Ohta): type-species of sugenus Yoshimopsis. Holotype (GF Y423), left internal mould, ×1. Loc. Yoshimo, Shimonoseki (Neocomian, Yoshimo formation). Reproduced from Ohta, 1974, pl. 1, fig. 11. Fig. 3. Micronectes bellaturus Ichikawa and Maeda: type-species of genus Micronectes. Holotype (OCU MM237), left external mould, × 7. Loc. Kamatani, Izumi mountains (Campanian, Izumi group). Reproduced from Ichikawa and Maeda, 1958b, pl. 5, fig. 15b. Fig. 4. Plicatounio (Plicatounio) naktongensis naktongensis Kobayashi and Suzuki: nominal subspecies of the type-species of genus Plicatounio. Holotype (to be preserved in the Geol. Survey of Korea), left valve of a bivalved specimen, ×1. Loc. Ryohori, Keisyo-nan-do (Low. Cretaceous, Naktong group). Reproduced from Kobayashi and Suzuki, 1936, pl. 28, fig. 1b. Fig. 5. The same species. Right valve of the same specimen. Reproduced from Kobyashi and Suzuki, 1936, pl. 28, fig. 1a. Fig. 6. Paranodonta otai Kobayashi and Suzuki: type-species of genus Paranodonta. Holotype (UMUT MM7921), right valve of a bivalved specimen, ×1. Loc. Rikimaru, Kurate (Kwanmon group). Reproduced from Kobayashi and Suzuki, 1936, pl. 17, fig. 7. Fig. 7. Pleurogrammatodon splendens Ichikawa and Maeda: type-species of genus Pleurogram matodon. Holotype (OCU MM145), side view (7a) and upper view (7b) of a left valve, ×1. Loc. Nada, Awaji (Maestrichtian, Izumi group). Reproduced from Ichikawa and Maeda, 1958a, pl. 1, figs. 1c, 2. Fig. 8. Microtrigonia amanoi Nakano: type-species of genus Microtrigonia. Holotype (KUMA0000la), clay cast of bivalved external mould, × 2. Loc. Ukimizu, Shimokoshiki (Santonian or Campanian, Himenoura group). Reproduced from Nakano, 1957a, pl. 9, fig. 21.

Gervillaria haradae (Yokoyama)
1890. Avicula Haradae Yokoyama, p. 199, pl. 25, fig. 12.-1926. Gervillia haradae (Yokoyama): Yabe, Nagao and Shimizu, p. 58, pl. 13, figs. 1-3, 7, pl. 14, fig. 2.-1934. Gervillia cf. haradae (Yokoyama): Nagao, p. 199, pl. 31, fig. 13.-1957b. Bakevellia sp.: Amano, p. 86, pl. 1, figs. 14, 15.-1963. Gervillaria haradae (Yokoyama): Matsumoto, Hayami and Asano, p. 32, pl. 51, fig. 12.-1965a, Gervillaria haradae (Yokoyama): Hayami, p. 269, pl. 35, figs. 3-6, pl. 36, fig. 1, pl. 37, fig. 2.
Type. —Lectotype designated by Hayami in Matsumoto, Hayami and Asano (1963, p. 32) from Kagahara, Nakazato, Gumma Pref.
Age and distribution. —Upper Neocomian-Albian. Ishido formation in Sanchu area, Yatsushiro formation in Yatsushiro area, and Miyako group (Hiraiga formation) in Tanohata area.

Gervillaria miyakoensis (Nagao)
1934. Gervillia miyakoensis Nagao, p. 197, pl. 31, figs. 1, 2, pl. 32, fig. 7-1965a. Gervillaria miyakoensis (Nagao): Hayami, p. 271, pl. 36, figs. 2-4, pl. 37, fig. 1.
Type. —Lectotype designated by Hayami (1965a, p. 271) (GMH no. 6777) from Raga, Tanohata, Iwate Pref.
Age and distribution. —Aptian-Albian. Miyako group (Aketo and Hiraiga formations) in Tanohata area.

Aguilerella quadrata (Nakazawa and Murata)
1966. Cuneigervillia quadrata Nakazawa and Murata, p. 311, pl. 3, figs. 9-11.
Type. —Holotype (UK JM11143) from Obirakizawa, Omine, Iwate Pref.
Age and distribution. —Neocomian. Kamihei group in Kamaishi area.

Gervillia (Cultriopsis) hosonaga (Kobayashi and Ichikawa)
1954a. Cultriopsis (Angustella?) hosonaga Kobayashi and Ichikawa, in Ichikawa, p. 55, pl. 7, fig. 1.
Type. —Holotype (UMUT MM5415) from Aral, Hinode, Tokyo Pref.
Age and distribution. —Triassic (precisely unknown). Arai formation in Itsukaichi area.

Gervillia (Cultriopsis) shizukawensis Hayami
1957b. Gervillia (Cultriopsis) shizukawensis Hayami, p. 97, pl. 6, fig. 1.
Type. —Holotype (UMUT MM2672) form Haragoe, Kahoku, Miyagi Pref.
Age and distribution. —Hettangian. Shizukawa group (Niranohama formation) in Mizunuma area.

Gervillia (Gervillia) tatenosawensis Tamura
1960a. Gervillia tatenosawensis Tamura, p. 227, text-fig. 3, pl. 26, figs. 9-14.-1960d. Gervillia tatenosawensis Tamura; Tamura, p. 233, pl. 2, fig. 6.
Type. —Holotype (UMUT MM3255) from Tatenosawa, Kashima, Fukushima Pref.
Age and distribution. —Kimmeridgian. Soma group (Nakanosawa formation) in Soma area, and Torinosu group (Kurisaka formation) in Sakuradani area.

Gervillia (Gervillia) takiensis Tamura
1960d. Gervillia takiensis Tamura, p. 233, pl. 2, figs. 1-3.
Type. —Holotype (UMUT MM3613) from Nioigataki, Sakawa, Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa and Sakuradani areas.

Gervillia (Gervillia) forbesiana d'Orbigny
1926. Gervillia forbesiana d'Orbigny: Yabe, Nagao and Shimizu, p. 57, pl. 12, figs. 36, 37, pl. 14, figs. 8, 9.-1927. Gervillia forbesiana d'Orbigny; Yabe, pl. 5, fig. 5.-1934. Gervillia forbesiana d'Orbigny: Nagao, p. 197, pl. 24, fig. 8, pl. 25, figs. 8-10.-1951. Gervilliopsis forbesiana (d'Orbigny): Shinohara, p. 26, pl. 11, fig. 2.-1965a, Gervillia (Gervillia) forbesiana d'Orbigny: Hayami, p. 276, pl. 37, figs. 7, 8, pl. 38, figs. 1-5 1972. Gervillia (Gervillia) forbesiana d'Orbigny: Shikama and Suzuki, pl. 4, fig. 13.
Age and distribution. —Upper Neocomian-Albian. Ishido formation in Sanchu area, Miyako group (Hiraiga formation) in Tanohata and Omoto areas, Yatsushiro formation in Yatsushiro area, Arita formation in Yuasa area, Oshima formation in Oshima area, Ofunato group (Funagawara formation) in Ofunato area, Hanoura formation in Katsu uragawa area, and Choshi formation in Choshi area. This species seems to be common in the Aptian-Albian of England and France.

Gervillia (Gervillia) metaforbesiana Amano and Matsumoto
1956. Gervillia metaforbesiana Amano and Matsumoto, in Amano, p. 72, pl. 1, figs. 14, 15.
Type. —Holotype (KU not registered) from Shishijima, Azuma, Kagoshima Pref.
Age and distribution. —Albian(?)-Cenomanian. Gosyonoura group in Shishijima island.
Remarks. —This species seems to be closely related to, if not identical with, Gervillia (Gervillia) forbesiana.

Kobayashites hemicylindricus Hayami [Pl. 2, Fig. 6]
1959e. Kobayashites hemicylindricus Hayami, p. 139, text-fig. 1, pl. 14, figs. 6-10.
Type. —Holotype (UMUT MM3130) from Shizuhama, Shizukawa, Miyagi Pref.
Age and distribution. —Bajocian. Hashiura group (Aratozaki formation) in Shizukawa area, and Ojika group (Tsukinoura formation) in Ojika area.

Pseudoptera sp. aff. P. viana Stephenson
1966. Pseudoptera sp. aff. P. viana Stephenson: Nakazawa and Murata, p. 313, pl. 4, fig. 2.
Age and distribution. —Neocomian. Kamihei group in Kamaishi area.

Pseudoptera? elongata (Nakazawa and Murata)
1966. Waagenoperna elongata Nakazawa and Murata, p. 312, pl. 4, fig. 1.
Type. —Holotype (IGPS no. 85764) from Kanayama-zawa, Omine, Iwate Pref.
Age and. distribution.-Neocomian. Kamihei group in Kamaishi area.

Pseudoptera acuticarinata (Nagao)
1932a, Gervillia (Pseudoptera) acuticarinata Nagao, p. 37, pl. 5, figs. 13-15.
Type. —Syntype (GMH not registered) from Pombetsu, Mikasa, Ishikari Prov., Hok kaido.
Age and distribution. —Cenomanian-Turonian. Middle Yezo group (Mikasa sandstone) in Ikushumbetsu area.

Cassianella ? dubia Kobayashi and Ichikawa
1949b. "Cassianella" dubia Kobayashi and Ichikawa, p. 184, pl. 6, fig. 10.
Type. —Holotype (UMUT MM5219) from Umenokidani, Sakawa, Kochi Pref.
Age and distribution. —Carnian. Kochigatani group (lower part) in Sakawa area.

Waagenoperna triangularis (Kobayashi and Ichikawa) [Pl. 2, Fig. 5]
1952b. Edentula (?) triangularis Kobayashi and Ichikawa, p. 268, text-figs. 1, 2.-1959. Waagenoperna triangularis (Kobayashi and Ichikawa): Tokuyama, p. 153, pl. 16, figs. 8-15.
Type. —Holotype (UMUT MM5399b) from Jito, Kawakami, Okayama Pref.
Age and distribution. —Carnian-Norian. Nariwa group in Nariwa area, and Mine group (Aso formation) in Mine area.

Waagenoperna ozawai (Kobayashi)
1935. Edentula ozawai Kobayashi, p. 30, pl. 7, figs. 3-6.
Type. —Syntype (UMUT MM5521, 4222-4224) from Shirogawara, Mine, Yamaguchi Pref.
Age and distribution. —Ladinian or Carnian. Atsu group (upper part) in Mine area.

Isognomon (Isognomon) rikuzenicus (Yokoyama)
1904. Perna rikuzenica Yokoyama, p. 13, pl. 1, fig. 1.-1957b. Isognomon rikuzenicus (Yokoyama): Hayami, p. 99, pl. 7, figs. 3-8.-compare 1957b. Isognomon cf. rikuzenicus (Yokoyama): Hayami, p. 100, pl. 7, figs. 1, 2.-compare 1959e. Isognomon sp. ex gr. rikuzenicus (Yokoyama): Hayami, p. 140.
Type. —Holotype by monotypy (UMUT MM7176) from Niranohama, Utatsu, Miyagi Pref.
Age and distribution. —Hettangian-Toarcian. Shizukawa group (Niranohama and Hosoura formations) in Shizukawa area.

Isognomon (Isognomon) sanchuensis (Yabe and Nagao)
1926. Perna sanchuensis Yabe and Nagao, in Yabe, Nagao and Shimizu, p. 57, pl. 12, figs. 1-4.-1965a. Isognomon (Isognomon') sanchuensis (Yabe and Nagao): Hayami, p. 278.
Type. —Lectotype designated by Hayami (1965a, p. 278) (IGPS no. 22457) from Hachimanzawa, Nakazato, Gumma Pref.
Age and distribution. —Aptian-Albian. Sebayashi formation (not Shiroi formation as formerly interpreted) in Sanchu area.

Isognomon (Isognomon) choshiensis Hayami
1965a. Isognomon (Isognomon) choshiensis Hayami, p. 279, pl. 39, fig. 1.
Type. —Holotype (GK H6255) from Ashikajima, Choshi, Chiba Pref.
Age and distribution. —Aptian. Choshi formation in Choshi area.

Isognomon (Mytiloperna) ageroensis Hayami
1957b. Isognomon (Mytiloperna) ageroensis Hayami, p. 101, pl. 6, figs. 4-8.
Type. —Holotype (UMUT MM2680) from Shinatani, Omi (Agero), Niigata Pref.
Age and distribution. —Pliensbachian-Toarcian. Kuruma group (Shinatani formation) in Omi area.

Pseudomytiloides lunaris (Hayami)
1960b. Parainoceramus lunaris Hayami, p. 295, pl. 15, fig. 1.
Type. —Holotype (UMUT MM3582) from Sakuraguchidani, Toyoda, Yamaguchi Pref.
Age and distribution. —Pliensbachian. Toyora group (Nishinakayama formation) in Toyoda area.
Remarks. —As pointed out by Speden (1970), this may be actually conspecific with Pseudomytiloides matsumotoi, but subsequently obtained topotype specimens are slightly different from the sample of P. matsumotoi from higher beds in the more lunar-shaped outline.

Pseudomytiloides matsumotoi (Hayami)
1960b. Parainoceramus matsumotoi Hayami, p. 296, pl. 15, figs. 2-8.-1960b. Para inoceramus cf. matsumotoi Hayami: Hayami, p. 297, pl. 15, fig. 9.-1960b. Parainoceramus sp. ex gr. matsumotoi Hayami: Hayami, p. 298, pl. 15, fig. 10.
Type. —Holotype (UMUT MM3584) from Ishimachi, Toyoda, Yamaguchi Pref.
Age and distribution. —Toarcian. Toyora group (Nishinakayama formation) in Toyora area.
Remarks. —This species is, if not conspecific with, very closely related to Pseudomy tiloides dubius (Sowerby) from the upper Lias of western Europe.

Inoceramus (Mytiloceramus) karakuwensis Hayami
1960b. Inoceramus (Mytiloceramus) karakuwensis Hayami, p. 299, pl. 15, fig. 17.
Type. —Holotype. (UMUT MM3597) from Tsunakizaka, Kesennuma, Miyagi Pref.
Age and distribution. —Bajocian. Karakuwa group (Tsunakizaka formation) in Kesen numa area.

Inoceramus (Retroceramus) sp. cf. I. (R.) lucifer von Eichwald
1960b. Inoceramus cf. lucifer von Eichwald: Hayami, p. 304, pl. 16, fig. 1.
Age and distribution. —Bajocian. Karakuwa group (Tsunakizaka formation) in Kesen numa area.

Inoceramus (Retroceramus) utanoensis Kobayashi
1926. Inoceramus utanoensis Kobayashi, p. 7, pl. 11, figs. 1, 2.-1960b. Inoceramus utanoensis Kobayashi: Hayami, p. 305, pl. 16, figs. 3-5.
Type. —Lectotype designated by Hayami (1960b, p. 305) (UMUT 9081) from Utano, Kikukawa, Yamaguchi Pref.
Age and distribution. —Bathonian (or thereabout). Toyora group (Utano formation) in Toyoda area.

Inoceramus (Retroceramus) ogurai Kobayashi
1926. Inoceramus Ogurai Kobayashi, p.7,pl.11,fig.3.-1960b.Inoceramus ogurai
Kobayashi: Hayami, p. 306, pl. 16, fig. 2.
Type. —Holotype by monotypy (UMUT MM9086) from Utano, Kikukawa, Yamaguchi Pref.
Age and distribution. —Bathonian (or thereabout). Toyora group (Utano formation) in Toyoda area.

Inoceramus (Mytiloides) morii Hayami
1959c. Inoceramus (s. 1.) morii Hayami, p. 59, pl. 5, figs. 12-14.-1960b. Inoceramus morii Hayami: Hayami, p. 300, pl. 15, figs. 11, 12.
Type. —Holotype (UMUT MM2953) from Akaiwazaki (Hosoura), Shizukawa, Miyagi Pref.
Age and distribution. —Bajocian. Hashiura group (Aratozaki formation) in Shizukawa area.

Inoceramus (Mytiloides) sp. aff. I. (M.) fuscus Quenstedt
1960b. Inoceramus sp. ex gr. fuscus Quenstedt: Hayami, p. 301, pl, 15, fig. 13.
Age and distribution. —Bajocian. Toyora group (Utano formation) in Toyoda area.

Inoceramus (Mytiloides) hashiurensis Hayami
1960b. Inoceramus hashiurensis Hayami, p. 303, pl. 15, fig. 16.
Type. —Holotype (UMUT MM3602) from Kuromorizawa, Kitakami (Hashiura), Miyagi Pref.
Age and distribution. —Middle Jurassic (precisely unknown). Hashiura group (Arato formation) in Hashiura area.

Inoceramus (Mytiloides) hamadae Hayami
1960b. Inoceramus hamadae Hayami, p. 302, pl. 15, fig. 14.
Type. —Holotype (UMUT MM3601) from Shimoyama, Izumi, Fukui Pref.
Age and distribution. —Callovian. Tetori group (Kaizara formation) in Izumi area.

Inoceramus (Mytiloides) sp.
1960b. Inocermus cf. nitescens Arkell: Hayami, p. 302, pl. 15, fig. 15.
Age and distribution. —Oxfordian. Tetori group (Nagano shale corresponding to Yam barazaka formation) in Izumi area.
Remarks. —Typical specimens of Inoceramus nitescens from the Corallian of England have widely spaced concentric rings which seem to be undeveloped in this Japanese species.

Inoceramus (Mytiloides) sp. aff. I. (M.) galoi Boehm
1960b. Inoceramus sp. ex gr. galoi Boehm: Hayami, p. 307, pl. 16, fig. 6.
Age and distribution. —Oxfordian (or thereabout). Hashiura group (Arato formation) in Hashiura area.

Inoceramus (Birostrina) concentricus nipponicus Nagao and Matsumoto
1939. Inoceramus concentricus var. nipponicus Nagao and Matsumoto, p. 267, pl. 24, fig. 2, pl. 25, figs. 1-6.-1959a. Inoceramus concentricus nipponicus Nagao and Matsumoto: Matsumoto, pl. 11, fig. a.-1971. Inoceramus concentricus nipponicus Nagao and Matsu moto: Noda, p. 28, pl. 1, figs. 1, 2.
Type. —Syntype (IGPS not registered) from Naibuchi, south Saghalin, syntype (GMH no. 7167a) from Yubarigawa, Ishikari Prov., Hokkaido, syntype (IGPS no. 58017) from Naibuchi, south Saghalin, syntype (GMH no. 5965) from Hobetsugawa, Iburi Prov., Hokkaido, syntype (UMUT I-687) from the middle course of the Obirashibe, Teshio Prov., Hokkaido.
Age and distribution. —Cenomanian. Middle Yezo group in various areas of Hokkaido and Saghalin, and Tano formation in Notsu area.

Inoceramus (Birostrina) concentricus costatus Nagao and Matsumoto
1939. Inoceramus concentricus var. constatus Nagao and Matsumoto, p. 270, pl. 24, figs. 1, 4, 5, pl. 27, fig. 2. -1966. Inoceramus sp. cf. teshioensis Nagao and Matsumoto: Tamura and Tashiro, p. 31, pl. 1, figs. 8, 9. -1966. Inoceramus B sp.: Tamura and Tashiro, p. 31, pl. 1, fig. 10.-1966. Inoceramus sp. cf. incertus Jimbo: Tamura and Tashiro, pl. 1, figs. 11-13.-1974. Inoceramus concentricus costatus Nagao and Matsumoto: Tamura in Tamura and Matsumura, p. 49, pl. 1, figs. 1-7.
Type. —Lectotype (UMUT I-690) from the Ikushumbetsu, Mikasa, Ishikari Prov., Hokkaido.
Age and distribution. —Cenomanian-Turonian. Middle Yezo group (Mikasa sandstone and its correlatives) in various areas of Hokkaido and south Saghalin, and Mifune group (lower formation) in Mifune area.

Inoceramus (Birostrina) concentricus subsulcatus Wiltshire
1964. Inoceramus concentricus subsulcatus Wiltshire: Matsumoto and Harada, p. 94, pl. 9, fig. 3.
Age and distribution. —Albian. Middle Yezo group (Member L2) in Yubari area. This subspecies has been known from England.

Inoceramus (Inoceramus) maedae Hayami [Pl. 2, Fig. 7]
1960b. Inoceramus maedae Hayami, p. 308, text-fig. 2, pl. 17, figs. 1-3.-1960b. Inoceramus maedae Hayami var. a.: Hayami, p. 311, pl. 16, fig. 7, pl. 18, fig. 2. -1960b. Inoceramus maedae Hayami var. b.: Hayami, p. 311, pl. 18, fig. 1.
Type. —Holotype (UMUT MM9076) from Mitarai, Shokawa, Gifu Pref.
Age and distribution. —Callovian. Tetori group (Mitarai formation) in Makito area.

Inoceramus (Inoceramus) anglicus Woods
1964. Inoceramus anglicus Woods: Matsumoto and Harada, p. 94, pl. 9, figs. 1, 2.
Age and distribution. —Albian. Middle Yezo group (Member L2) in Yubari area. This species has been known from England.

Inoceramus (Inoceramus) sp. aff. I. (I.) crippsi Mantell
1928. Inoceramus aff. crippsi Mantell: Yabe and Nagao, p. 83, pl. 16, figs. 11, 12.-1940. Inoceramus sp. aff. I. cripsii Mantell [sic]: Nagao and Matsumoto, p. 7, pl. 2, figs. 3, 6, 7.
Age and distribution. —Cenomanian. Middle Yezo group (mainly Mikasa sandstone) in Yubari, Ikushumbetsu and Obirashibe areas.

Inoceramus (Inoceramus) yabei Nagao and Matsumoto
1939. Inoceramus yabei Nagao and Matsumoto, pl. 34, figs. 5-7 (illustration only). -1940. Inoceramus yabei Nagao and Matsumoto, p. 1, pl. 1, fig. 1 (non pl. 1, figs. 2-6).-compare 1940. Inoceramus sp. a aff. J. yabei Magao and Matsumoto: Nagao and Matsumoto, p. 6, pl. 2, figs. 1, 2.-compare 1940. Inoceramus sp. b aff. I. yabei Nagao and Matsumoto, p. 10, pl. 2, figs. 4, 5.
Type. —Lectotype designated by Matsumoto and Harada (1964, p. 96) (IGPS no. 22685) from Ikushumbetsu, Mikasa, Ishikari Prov., Hokkaido.
Age and distribution. —Cenomanian. Middle Yezo group (Mikasa sandstone and its correlatives) in Ikushumbetsu, Yubari, Obirashibe, Oyubari, Hobetsu and Naibuchi areas.

Inoceramus (Inoceramus) hobetsensis Nagao and Matsumoto
1925. Inoceramus cf. percostatus Müller: Yabe and Nagao, p. 115, pl. 28, figs. 7, 8, pl. 29, fig. 10. -1935. Inoceramus hobetsensis Nagao and Matsumoto: Nagao, p. 198, pl. 1 (nom. nud.). -1939. Inoceramus hobetsensis (Nagao and Otatume MS) Nagao and Matsumoto, p. 281, pl. 28, fig. 3, pl. 29, figs. 1, 3-6, pl. 30, figs. 2, 3.-1939. Inoceramus hobetsensis var. nonsulcatus Nagao and Matsumoto, p. 282, pl. 27, fig. 3, pl, 28, fig. 4, pl. 31, fig. 1.-1959a. Inoceramus hobetsensis Nagao and Matsumoto: Matsumoto, pl. 11, fig. b. -1969. Inoceramus hobetsensis Nagao and Matsumoto: Noda, p. 4, pl. 1, figs. 1, 2. -1971. Inoceramus hobetsensis Nagao and Matsuinoto: Noda, p. 26, pl. 1, figs. 3-7.
Type. —Syntype (GMH no. 442) from unknown locality, syntype (UMUT I-793) from Obirashibe, Ishikari Prov., Hokkaido, syntype (UMUT I-813) from unknown locality, syntype (IGPS nos. 8057, 37285) from unknown locality, syntype (GMH no. 7143) from Hakkinsawa, Oyubari, Ishikari Prov.
Age and distribution. —Turonian. Middle Yezo group (upper part) in various areas of Hokkaido and Saghalin, and Onogawa group (Ryozen formation) in Onogawa area.

Inoceramus (Inoceramus) teshioensis Nagao and Matsumoto
1939. Inoceramus teshioensis Nagao and Matsumoto, p. 274, pl. 24, figs. 6, 7, 9, pl. 26, figs. 5-7. -1940. Inoceramus yabei Nagao and Matsumoto, p. 1 (pars), pl. 1, figs. 2-6 (non pl. 1, fig. 1.) -1969. Inoceramus teshioensis Nagao and Matsumoto: Noda, pl. 1, figs. 2-4.-1971. Inoceramus teshioensis Nagao and Matsumoto; Noda, p. 28, pl. 2, figs. 1-3.
Type. —Syntype (UMUT I-721) from Abeshinai, Teshio Prov., Hokkaido, syntype (GMH no. 5961) from Kamihobetsu, Iburi Prov., Hokkaido, syntype (IGPS no. 22643) from Horomui, Ishikari Prov., Hokkaido, syntype (UMUT I-720a, b) from. Obirashibe, Teshio Prov. Hokkaido.
Age and distribution. —Turonian. Middle Yezo group (Saku formation and its correla-tives) in various areas of Hokkaido, and Onogawa group (Ryozen formation) in Onogawa area.

Inoceramus (Inoceramus) tenuistriatus Nagao and Matsumoto
1939. Inoceramus tenuistriatus Nagao and Matsumoto, p. 272, pl. 24, fig. 8, pl. 26, figs. 1-4.
Type. —Syntype (UMUT I-700,I-701, GMH nos. 7192, 7187, 7185, IGPS nos. 22751, 22769) from Pombetsu, Mikasa, Ishikari Prov., Hokkaido.
Age and distribution. —Turonian. Middle Yezo group (upper part) and Upper Yezo group (lower part) in Ikushumbetsu and some other areas of Hokkaido.

Inoceramus (Inoceramus) incertus Jimbo
1894. Inoceramus incertus Jimbo, p. 43, pl. 8, fig. 7.-1940. Inoceramus incertus Jimbo: Nagao and Matsumoto, p. 10, pl. 3, figs. 1-5, pl. 10, fig. 2. -1940. Inoceramus incertus var. yubariensis Nagao and Matsumoto, p. 11, pl. 6, fig. 1. -1963. Inoceramus incertus Jimbo: Matsumoto, p. 45, pl. 67, fig. 7.
Type. —Syntype (UMUT MM7535=I-152) from the Pombetsu, Mikasa, Ishikari Prov., Hokkaido. Jimbo's original figure was synthetized from more than three frag mentary specimens (see Matsumoto, 1963, p. 45).
Age and distribution. —Turonian. Middle Yezo group (upper part) in Ikushumbetsu area.

Inoceramus (Inoceramus) angulosus Jimbo
1894. Inoceramus angulosus Jimbo, p. 43, pl. 8, fig. 6.-1963. Inoceramus angulosus Jimbo: Matsumoto, p. 45, pl. 67, fig. 6.
Type. —Holotype by monotypy (UMUT MM7534=I-150) from Ponhorokabetsu, Yubari, Ishikari Prov., Hokkaido.
Age and distribution. —Turonian (or thereabout). Middle Yezo group (Mikasa sandstone) in Yubari area.

Inoceramus (Inoceramus) iburiensis Nagao and Matsumoto
1939. Inoceramus iburiensis Nagao and Matsumoto, p. 291, pl. 31, figs. 1, 2, pl. 32, fig. 2. -? 1939. Inoceramus sp. nov. ? (Inoceramus mukawaensis Otatume MS): Nagao and Matsu moto, p. 293, pl. 32, figs. 1, 3.
Type. —Syntype (GMH nos. 5968, 7207, 7260, IGPS no. 57829) from Obirashibe, Teshio Prov., Hokkaido.
Age and distribution. —Turonian. Middle Yezo group (upper part) in various areas of Hokkaido and Saghalin.

Inoceramus (Inoceramus) uwajimensis Yehara
1924. Inoceramus uwajimensis Yehara, p. 36, pl. 3, figs. 1, 2, pl. 4, fig. 2 (non figs. 1, 3).-1939. Inoceramus uwajimensis Yehara: Nagao and Matsumoto, p. 286, pl. 34, figs. 1, 3, 4, 6, pl. 35, figs. 1-3.-1939. Inoceramus uwajimensis var. yeharai Nagao and Matsumoto, p. 287, pl. 34, figs. 2, 5, pl. 35, fig. 4.-1959a. Inoceramus uwajimensis Yehara: Matsumoto, pl. 11, fig. c.-1961. Inoceramus cf. uwajimensis Yehara: Takai and Matsumoto, p. 273, pl. 11, figs. 2-4.-1962. Inoceramus uwafimensis Yehara: Saito, p. 65, pl. 1, figs. 14, 17.-1962. Inoceramus yeharai Nagao and Matsumoto: Saito, p. 66, pl. 1, figs. 19, 20.-1969. Inoceramus uwajimensis Yehara: Noda, pl. 1, fig. 5.-1969. Inoceramus uwajimensis yeharai Nagao and Matsumoto: Noda, pl. 1, fig. 6. -1971. Inoceramus uwajimensis (Ye hara): Noda, p. 26, pl. 2, fig. 4.-1971. Inoceramus sp. cf. I. uwajimensis (Yehara): Noda, p. 27, pl. 2, figs. 6, 7.-1972. Inoceramus uwajimensis (Yehara): Kanie, p. 21, pl. 3, figs. 4,5.
Type. —Lectotype designated by Matsumoto in Takai and Matsumoto (1961, p. 273) (UK not registered) from Furushiroyama, Uwajima, Ehime Pref.
Age and distribution. —Coniacian. Upper Yezo group (lower part) in various areas of Hokkaido, Futaba group (Ashizawa formation) in Futaba area, Uwajima group (Furu shiroyama formation) in Uwajima area, Onogawa group (Shibakita and Inukai formations) in Onogawa area, and Himenoura group (lower part) in Amakusa islands.

Inoceramus (Inoceramus) mihoensis Matsumoto
1940. Inoceramus sp. aff. I. yabei nov.: Nagao and Matsumoto, p. 1 (pars), pl, 2, fig. 8.-1957. Inoceramus mihoensis Matsumoto, p. 65, pl. 21, figs, 1-4.-1959a. Inoceramus mihoensis Matsumoto: Matsumoto, pl. 11, fig. d.-1969. Inoceramus mihoensis Matsumoto: Noda, pl. 2, fig. 1.-1971. Inoceramus mihoensis Matsumoto: Noda, p. 29, pl. 3, figs. 1, 2.
Type. —Holotype (GK H358) from Miho, Naibuchi, south Saghalin.
Age and distribution. —Coniacian. Upper Yezo group in various areas of south Saghalin and Hokkaido, and Onogawa group (Inukai and Yoshino formations) in Onogawa area.

Inoceramus (Inoceramus) amakusensis Nagao and Matsumoto
1940. Inoceramus amakusensis Nagao and Matsumoto, p. 13, pl. 3, fig. 6, pl. 4, figs. 1, 3, 4, pl. 5, fig. 1.-1959a. Inoceramus amakusensis Nagao and Matsumoto: Matsumoto, pl. 11, fig. e.-1962. Inoceramus amakusensis Nagao and Matsumoto: Matsumoto and Ueda, p. 161, text-fig. 12, pl. 22, figs. 1-3.-1969. Inoceramus amakusensis Nagao and Matsumoto: Noda, pl. 2, fig. 5.-compare 1970. Inoceramus sp. cf. I. amakusensis Nagao and Matsumoto: Morozumi, p. 21, pl. 2, fig. 1, pl. 3, figs. 1-4, pl. 4, fig. 1,-1971. Inoceramus amakusensis Nagao and Matsumoto: Noda, p. 30, pl. 3, fig. 8.
Type. —Lectotype designated by Matsumoto and Ueda (1962, p. 161) (UMUT I-960) from Hinoshima, Ryugatake (Amakusa-kamishima), Kumamoto Pref.
Age and distribution. —Santonian. Himenoura group in Amakusa islands, Upper Yezo group in various areas of Hokkaido, and Onogawa group (Amabe formation) in Onogawa area.

Inoceramus (Inoceramus) pedalionoides Nagao and Matsumoto
1939. Inoceramus pedalionoides Nagao and Matsumoto, p. 277, pl. 26, figs. 8, 9.
Type. —Syntype (IGPS no. 22720) from Pombetsu, Mikasa, Ishikari Prov., Hokkaido, syntype (GMH no. 5969) from a tributary of the Pankemoyuparo, Ishikari Prov., Hokkaido.
Age and distribution. —Turonian (or thereabout). Upper Yezo group (lowest part) in Ikushumbetsu area, and Middle Yezo group (upper part) in various areas of Hokkaido.

Inoceramus (Inoceramus) hetonaianus Matsumoto
1952. Inoceramus hetonaianus Matsumoto, in Tanaka, Matsumoto and Mayeda, p. 72, text-fig. 2.-1959a. Inoceramus hetonaianus Matsumoto: Matsumoto, pl. 11, fig. k.
Type. —Syntype (GK H629-H631, 634a-e, 638a-f) from Hokkaido (not precisely reported).
Age and distribution. —Maestrichtian. Hakobuchi group (upper part) in Hokkaido, and (?) Izumi group (upper part) in Awaji island.

Inoceramus (Sphenoceramus) yokoyamai Nagao and Matsumoto
1940. Inoceramus yokoyamai Nagao and Matsumoto, p. 44, pl. 16, fig. 2, pl. 20, fig, 2, pl. 21, fig. 2.-1969. Inoceramus yokoyamai Nagao and Matsumoto: Noda, pl. 2, fig. 2.
Type. —Syntype (IGPS no. 7124) from Kawakami, south Saghalin, syntype (GMH no. 376a) from Abeshinai, Nakagawa, Teshio Prov., Hokkaido.
Age and distribution. —Upper Yezo group in Naibuchi, Abeshinai, Iburi and Hidaka areas, and Onogawa group (Tsuru formation) in Onogawa area.

Inoceramus (Sphenoceramus) orientalis orientalis Sokolow
1894. Inoceramus digitatus Sowerby: Jimbo, p. 43, pl. 8, fig, 8 (non figs. 9, 10). -1914. Inoceramus orientalis Sokolow: Nagao and Matsumoto, p. 37, pi. 16, figs, 4, 5, pl. 17, figs. 3, 7, pl. 18, figs. 1-4. -1959a. Inoceramus orientalis Sokolow: Matsumoto, pl. 11, fig. i. -1962. Inoceramus orientalis orientalis Sokolow: Matsumoto and Ueda, p. 167, pl. 25, fig. 2.-1963. Inoceramus orientalis orientalis Sokolow: Matsumoto, p. 46, pl. 67, fig. 8.
Type. —Lectotype designated by Matsumoto and Ueda (1962, p. 167) from the Amba, north Saghalin.
Age and distribution. —Campanian. Upper Yezo group in various areas of Saghalin and Hokkaido, and Hakobuchi group in Hetonai area.

Inoceramus (Sphenoceramus) orientalis nagaoi Matsumoto and Ueda
1894. Inoceramus aff. lobatus Muuml;nster: Jimbo, p. 44, pl. 8, fig. 11. -1940. Inoceramus orientalis var. ambiguus Nagao and Matsumoto, p. 37, pl. 15, figs. 3, 4, pl. 17, figs. 1, 2. (non Inoceramus ambiguus von Eichwald, 1865)-1960. Inoceramus orientalis var. ambiguus Nagao and Matsumoto: Amano, p. 9, pl. 1, figs. 1-3, 6, 8, 10.-1962. Inoceramus orientalis nagaoi Matsumoto and Ueda, p. 167, pl. 23, figs. 1-5.-1963. Inoceramus orientalis nagaoi Matsumoto and Ueda: Matsumoto, p. 46, pl. 67, fig. 11.
Type. —Lectotype designated by Matsumoto and Ueda (1962, p. 167) (GMH no. 3808) from Osachinai, Hiratori, Hidaka Prov., Hokkaido.
Age and distribution. —Santonian-Campanian. Upper Yezo group in various areas of Hokkaido and Saghalin, and Himenoura group in Amakusa islands.

Inoceramus (Sphenoceramus) naumanni Yokoyama
1890. Inoceramus Naumanni Yokoyama, p. 174, pl. 17, figs. 3-5.-1940. Inoceramus naumanni Yokoyama: Nagao and Matsumoto, p. 31, pl. 13, fig. 4, pl. 14, figs. 1-10, pl. 15, figs. 1, 2, pl. 17, fig. 6.-1959a. Inoceramus naumanni Yokoyama: Matsumoto, pl. 11, fig. h.-1963. Inoceramus naumanni Yokoyama: Matsumoto, Hayami and Asano, p. 28, pl. 44, figs. 3-5.-1969. Inoceramus naumanni Yokoyama: Noda, pl. 2, figs. 3, 4.-1971. Inoceramus naumanni (Yokoyama): Noda, p. 30, pl. 3, figs. 3-6.-1973. Inoceramus (Sphenoceramus) naumanni naumanni Yokoyama: Tanabe, p. 180, pl. 27, figs. 1-5, pl. 28, figs. 1-4, 7-9.
Type. —Lectotype designated by Matsumoto in Matsumoto, Hayami and Asano (1963, p. 28) from Urakawa, Hidaka Prov., Hokkaido.
Age and distribution. —Coniacian-Santonian. Upper Yezo group in various areas of Hokkaido and Saghalin, Onogawa group (Tsuru formation) in Onogawa area, and Himenoura group in Amakusa islands.

Inoceramus (Sphenoceramus) schmidti Michael
1873. Inoceramus digitatus Sowerby: Schmidt, p. 25, pl. 5, fig. 10, pl. 6, figs. 1, 2, 4, 6, pl. 7, figs. 1, 3, 5-10, pl. 8, fig. 14 (non pl. 6, fig. 7). -1873. Inoceramus digitatus var. irregulari-costata Schmidt, p. 31, pl. 8, fig. 15.-1873. Inoceramus digitatus var. decussata Schmidt, p. 31, pl. 7, fig. 4. -1894. Inoceramus digitatus Sowerby: Jimbo, p. 43, pl. 8, fig. 10 (non figs. 8, 9). -1899. Inoceramus schmidti Michael, p. 160, pl. 5, fig. 1, pl. 6, figs. 1, 3-5.-1914. Inoceramus schmidti Michael: Sokolow, p. 67, pl. 1, fig. 1, pl. 2, figs. 1, 2, pl. 3, figs. 1, 2. -1915. Inoceramus schmidti Michael: Yabe, p. 23, pl. 1, figs. 10, 11.-1940. Inoceramus schmidti Michael: Nagao and Matsumoto, p. 41, pl. 8, fig. 5, pl. 17, figs. 4, 5, pl. 19, figs. 1-4, pl. 20, fig. 1.-1959a. Inoceramus schmidti Michael: Matsumoto, pl. 11, fig. j.-1963. Inoceramus schmidti Michael: Matsumoto, p. 46, pl. 67, fig. 10.-1973. Inoceramus (Sphenoceramus') naumanni schmidti Michael: Tanabe, p. 180, pl. 27, fig. 6, pl. 28, figs. 5, 6, 10-18.
Type. —Syntype from Cape Jonquière near Alexandrovsk, north Saghalin.
Age and distribution. —Campanian. Hakobuchi group in various areas of Hokkaido, Ryugase group in various areas of Saghalin, and Sotoizumi group (Toyajo formation) in Kanaya area.

Inoceramus (Sphenoceramus) sachalinensis Sokolow
1873. Inoceramus digitatus Sowerby: Schmidt, p. 25 (pars), pl. 6, fig. 7 (only).-1894. Inoceramus digitatus Sowerby: Jimbo, p. 43, pl. 8, fig. 9 (non figs. 8, 10). -1914. Inoceramus sachalinensis Sokolow, p. 71, pl. 1, fig. 2, pl. 2, figs. 3, 4, pl. 3, figs. 3, 4, pl. 4, fig. 1.-1927. Inoceramus sachalinensis Sokolow: Yabe, pl. 7, fig. 2. -1940. Inoceramus sachalinensis Sokolow: Nagao and Matsumoto, p. 45, pl. 15, fig. 5, pl. 16, fig. 1, pl. 20, figs. 3, 4, pl. 21, figs. 1, 4, pl. 22, fig. 1. -1963. Inoceramus sachalinensis Sokolow: Matsumoto, p. 46, pl. 67, fig. 9.
Age and distribution. —Campanian. Ryugase group in various areas of Saghalin, and Upper Yezo group and Hakobuchi group in various areas of Hokkaido.

Inoceramus (Sphenoceramus) elegans elegans Sokolow
1914. Inoceramus elegans Sokolow, p. 74, pl. 1, figs. 3, 4, -1940. Inoceramus pseudosulcatus var. elegans Sokolow: Nagao and Matsumoto, p. 49, pl. 22, fig. 3.
Type. —Lectotype designated by Matsumoto in Takai and Matsumoto (1961, p. 276) from Alexandrovsk, north Saghalin.
Age and distribution. —Santonian-Campanian, Upper Yezo group (upper part) and Hakobuchi group (lower part) in various areas of Hokkaido and Saghalin.

Inoceramus (Sphenoceramus) elegans pseudosulcatus Nagao and Matsumoto
1940. Inoceramus pseudosidcatus Nagao and Matsumoto, p. 48, pl. 21, fig. 3, pl. 22, fig. 2.-1961. Inoceramus elegans pseudosulcatus Nagao and Matsumoto: Takai and Matsumoto, p. 275, pl. 12, figs. 1, 2.
Type. —Lectotype (GMH no. 5988a) designated by Matsumoto in Takai and Matsumoto (1961, p. 276) from Horokakuriki, Yubari, Ishikari Prov., Hokkaido.
Age and distribution. —Campanian. Hakobuchi group (lower part) in Yubari, Hetonai, Urakawa and some other areas of Hokkaido, and Himenoura group (upper part) in Nagashima area.

Inoceramus (Cataceramus) ezoensis Yokoyama
1890. Inoceramus sp.: Yokoyama, p. 175, pl. 18, figs. 6, 7.-1915. Inoceramus ezoensis Yokoyama, in Yabe, p. 23, pl. 4, fig. 1.-1940. Inoceramus ezoensis Yokoyama: Nagao and Matsumoto, p. 16, pi. 7, fig. 1, pl. 10, fig. 3, pl. 11, fig. 3.-compare 1940. Inoceramus essoensis var. vanuxemiformis Nagao and Matsumoto, p. 17, pl. 10, fig. 4, pl. 11, fig. 2.-1963. Inoceramus ezoensis Yokoyama: Matsumoto, Hayami and Asano, p. 29, pl. 44, figs. 6, 7.-compare 1970. Inoceramus cf. I. ezoensis Yokoyama: Morozumi, p. 22, pl. 4, figs. 2,3
Type. —Syntype from Urakawa, Hidaka Prov., Hokkaido. Syntype of Inoceramus ezoensis var. vanuxemiformis (UMUT I-985) from the upper course of Bannosawa, Ishikari Prov. Hokkaido, and syntype of the same variety (GMH no. 7251) from Hetonai, Iburi Prov., Hokkaido.
Age and distribution. —Santonian. Upper Yezo group in various areas of Hokkaido.

Inoceramus (Cataceramus) japonicus Nagao and Matsumoto
1940. Inoceramus japonicus (Sasa MS) Nagao and Matsumoto, p. 24, pl. 5, fig. 2, pl. 6, figs. 2, 3, pl. 7, figs. 2, 3, pl. 8, figs. 1-4, pl. 9, figs. 1, 2.-1959a. Inoceramus japonicus Nagao and Matsumoto: Matsumoto, p. 86, pl. 11, fig. f.-1962. Inoceramus japonicus Nagao and Matsumoto: Matsumoto and Ueda, p. 165, pl. 22, fig. 4, pl. 24, fig. 1.
Type. —Lectotype designated by Matsumoto and Ueda (1962, p. 165) (UMUT I-1013) from Kunitan, Kuji, Iwate Pref.
Age and distribution. —Santonian. Kuji group (Kunitan formation) in Kuji area, Upper Yezo group in various areas of Hokkaido and Saghalin, and Himenoura group in Amakusa islands.

Inoceramus (Cataceramus) balticus toyajoanus Nagao and Matsumoto
1915. Inoceramus cf. regularis d'Orbigny: Yabe, p. 22, pl. 3, fig. 3.-1924. Inoceramus cf. regularis d'Orbigny: Yehara, p. 38, pl. 2, fig. 5.-1927. Inoceramus cf. regularis d'Orbigny: Yabe, pl. 7, fig. 1.-1940. Inoceramus balticus Böhm: Nagao and Matsumoto, p. 18, pl. 10, fig. 1, pl. 13, fig. 1.-1940. Inoceramus balticus var. toyajoanus Nagao and Matsumoto, p. 20, pl. 9, fig. 3.-1957a. Inoceramus balticus Böhm: Amano, p. 57, pl. 2, figs. 2-5, 7.-1961. Inoceramus cf, balticus toyajoanus Nagao and Matsumoto: Takai and Matsumoto, p. 274, pl. 11, fig. 1, pl. 12, fig. 3.-1962. Inoceramus balticus toyajoanus Nagao and Matsumoto: Matsumoto and Ueda, p. 164, pl. 23, figs. 6, 7.-1962. Inoceramus balticus toyajoanus Nagao and Matsumoto: Nagai, Nakano, Yoshida and Ohtsuka, p. 96, pl. 1, fig. 1.
Type. —Lectotype designated by Matsumoto in Takai and Matsumoto (1961, p. 274) (IGPS no. 4539) from Toyajo, Kanaya, Wakayama Pref.
Age and distribution. —Campanian. Sotoizumi group (Toyajo formation) in Kanaya area, Izumi group in Matsuyama area, and Awaji island, and Himenoura group in Amakusa and Koshikijima islands.

Inoceramus fukadae Hayami
1960b. Inoceramus (s. l.)fukadae Hayami, p. 313, text-fig. 3, pl. 16, fig. 10.
Type. —Holotype (UMUT MM3605) from Kodaijima, Ishinomaki, Miyagi Pref.
Age and distribution. —Bajocian. Ojika group (Kodaijima formation) in Ojika area.

Inoceramus furukawensis Hayami
1960b. Inoceramus furukawensis Hayami, p. 311, pl. 16, fig. 8.
Type. —Holotype (UMUT MM3604) from Wakidani, Kawai, Gifu Pref.
Age and distribution. —Oxfordian (or thereabout). Tetori group (Sugisaki sandstone) in Furukawa area.

Inoceramus pilvoensis Sokolow
1914. Inoceramus pilvoensis Sokolow, p. 39, 77, pl. 5, figs. 3-5.-1940. Inoceramus pilvoensis Sokolow: Nagao and Matsumoto, p. 55, pl. 22, fig. 5.
Age and distribution. —Upper Cretaceous (precise age and distribution unknown).

Inoceramus kusiroensis Nagao and Matsumoto
1940. Inoceramus kusiroensis Nagao and Matsumoto, p. 56, pl. 22, fig. 4.
Type. —Holotype (GMH no. 7271) from Otamura, Kushiro Prov., Hokkaido.
Age and distribution. —Maestrichtian. Nemuro group (Monshizu formation) in Akkeshi area, and Hakobuchi group (upper part) in Hetonai area.

Inoceramus shikotanensis Nagao and Matsumoto
1940. Inoceramus shikotanensis (Inai MS) Nagao and Matsumoto, p. 28, pl. 11, fig. 1, pl. 12, figs. 1, 3, 4.-1959a. Inoceramus shikotanensis Nagao and Matsumoto: Matsumoto, pl. 11, fig. g.-compare 1962. Inoceramus cf. shikotanensis Nagao and Matsumoto: Saito, p. 67, pl. 2, figs. 1, 2.
Type. —Syntype (GMH no. 7265) from Hetonai, Iburi Prov., Hokkaido, syntype (UMUT I-664) from Awaji, Hyogo Pref., syntype (GMH no. 7257a) from Shikotan, Kurile islands.
Age and distribution. —Maestrichtian. Hakobuchi group (upper part) in Hetonai area, Nemuro group in Shikotan island, and Izumi group in Awaji island.

Inoceramus teraokai Matsumoto and Noda
1968. Inoceramus teraokai Matsumoto and Noda, p. 319, pl. 32, figs. 1-5. -1971, Inoceramus teraokai Matsumoto and Noda: Noda, p. 28, pl. 2, figs. 1-3.
Type. —Holotype (GK H6833) from Yamaji, Usuki, Oita Pref.
Age and distribution. —Turonian. Tano formation in Notsu area.

Inoceramus yuasai Noda
1962. Inoceramus sp.: Nagai, Nakano, Yosbida and Ohtsuka, p. 3, pl. 1, fig. 2.-1974. Inoceramus yuasai Noda, p. 242, pl. 34, figs. 1-10.
Type. —Holotype (GK H6823) from Nakanokawa, Ipponmatsu, Ehime Pref.
Age and distribution. —Campanian (or thereabout). Shimantogawa group (Misho formation) in Johen area.

Inoceramus sp. cf. I. cycloides Wegner
1970. Inoceramus sp. cf. I. cycloides Wegner: Morozumi, p. 22, pl. 4, fig. 4.
Age and distribution. —Santonian (or thereabout), Hidakagawa group (Terasoma formation) in Yura area.

Inoceramus ? kudoi Hayami
1960b. Inoceramus (s. 1.) kudoi Hayami, p. 312, pl, 16, fig. 9, pl. 18, figs. 3, 4.
Type. —Holotype (UMUT MM9088) from Hosoura, Shizukawa, Miyagi Pref.
Age and distribution. —Toarcian-Bajocian. Shizukawa group (Hosoura formation) in Shizukawa area.

Inoceramus? naganoensis Hayami
1960b. Inoceramus (?) naganoensis Hayami, p. 315, pl. 18, fig. 6.
Type. —Holotype (UMUT MM3611) from Nagano, Izumi, Fukui Pref.
Age and distribution. —Oxfordian (or thereabout). Tetori group ("Nagano formation") in Izumi area.

Inoceramus? awajiensis Matsumoto
1952. Inoceramus awajiensis Matsumoto, in Tanaka, Matsumoto and Mayeda, p. 72, text fig. 1.
Type. —Syntype (GK H641-H651) from Awaji island (not precisely reported).
Age and distribution. —Campanian-Maestrichtian. Izumi group (Shimonada siltstone) in Awaji island.