Plate VII. 



Fig. 1. Jouannetia japonica Yok. Enlarged, a. View from above, b. Left valve, 



inside, c. Do, outside. Otsu. p. 105. 

 Figs. 2, 3. Saxicava orientalis Yok. Enlarged. 2. a. b. Left valve. 3. Right valve. 



Otsu. p. 106. 

 Figs. 4, 5, 6. Corbula venusta Gld. Enlarged. 4. a. b. Left valve. 5. a. b. Eight 



valve. 6. View from above. Yokosuka. p. 107. 

 Fig. 7. Basterotia gonldii Ad. Enlarged, a. Inside of right valve, b. Outside of 



the same. Otsn. p. 108. 

 Figs. 8, 9. Basterotia trapezium Yok. Enlarged. 8. a. b. Right valve. 9. a. b. 



Left valve. Otsu. p. 108. 

 Fig. 10. Mactra veneriformis l)esh. Left valve, a. Inside, b. Outside. Otsn. p. 109. 

 Fig. 11. Lutraria radiata Yok. Right valve, a. Outside, b. Inside. Naganuma. 



p. 110. 

 Figs. 12, 13. Solecurtus abbreviatus Gld. 12. a. b. Left valve. 13. a. b. Right 



valve. Naganuma. p. 111. 

 Fig. 14. Solecurtus divaricatus Lke. Right valve. Otsn. p. 112. 

 Fig. 15. Tellina nitidula Dkr. Left valve, a. Outside, b. Inside. Okine. p. 112. 

 Figs. 16, 17. Tellina ojiensis Tok. Enlarged. IG. a. b. Left valve. 17. a. b. Right 



valve Naganuma. p. 113. 

 Fig. 18. Tellina miyatensis Yok. Enlarged. Right valve, a. Inside, b. Outside. 



Kami-Miyata. p. 115.' 

 Figs. 19, 20. Macoma dissimilis Mart. 19. a. b. Right valve. 20. Right valve 



having a somewhat larger sinus. Otsu. p. 116. 

 Figs. 21, 22. Ervilia otsuensis Yok. 21. a. b. Left valve. 22. Right valve. Otsu. 



p. 109. 

 Fig. 23. Solen gordonis Yok. Right valve, a. Inside, b. Outside. Shimo-Miyata. 



p. 111. 

 Fig. 24. Tellina serricostata Tok. Right valve, a. Outside, b. Inside. Kami- 

 Miyata. p. 115. 

 Fig. 25. Tellina vestalioides Yok. Left valve, a. Inside, b. Outside. Naganuma. 



p. 114. 



