Solemya suprajurensis Hayami [Pl. 1, Fig. 2]
1959f. Solemya suprajurensis Hayami, p. 141, pl. 12, fig. 1.
Type. —Holotype (UMUT MM3138) from Mitarai, Shokawa, Gifu Pref.
Age and distribution. —Callovian. Tetori group (Mitarai formation) in Makito 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).

Solemya kobayashii Tamura
1960d. Solemya kobayashii Tamura, p. 231, pl. 2, figs. 4, 5.
Type. —Holotype (UMUT MM3615) from Iwasa, Sakawa. Kochi Pref.
Age and distribution. —Upper Jurassic. Torinosu group in Sakawa area.

Solemya angusticaudata Nagao
1932a. Solemya angusticaudata Nagao, p. 25, pl. 5, fig. 7.-1938. Solemya cf. angusticaudata Nagao: Nagao and Otatume, p. 36, pl. 1, fig. 11.
Type. —Holotype by monotypy (GMH no. 4568) from the upper course of the Ikushumbetsu, Mikasa, Ishikari Prov., Hokkaido.
Age and distribution. —Coniacian-Maestrichtian. Upper Yezo group in Ikushumbetsu area, and Hakobuchi group in Hetonai area.

Solemya sp.
1938. Solemya cf. angusticaudata Nagao: Nagao, p. 118, pl. 14, figs. 1, 2.
Age and distribution. —Albian (or thereabout). Lower Yezo group in Ikushumbetsu area.

Solemya murotoensis Kobayashi
1956. Solemya angusticaudata Nagao: Katto and Ozaki, p. 2, figs. 1, 2.-1957b. Solemya (Acharax?) murotoensis Kobayashi, p. 356, text-fig. 1, p1. 3, figs. 17, 18.
Type. —Holotype (Kochi Univ. not registered) from Sakamoto, Muroto, Kochi Pref.
Age and distribution. —Probably Palaeogene (not Cretaceous as formerly interpreted). Muroto formation in Muroto area.