Plate ÏX. 



Fig. 1. Solen grandis Dkr. Left valve. Ôtake. P. 134. 



Figs. 2, 3. Montacnta japonica Yok. 2 Left valve. 3. Eiglit valve. Otake. P. 



157. 

 Fig. 4. Psammobia kazusensis Yok, Left valve. Sbitö. P. 136. 

 Fig. 5. Solen krusensterni. Scbrenck. Kiglit valve. Otake. P. 134. 

 Fig. 6. Raeta pellicula Desli. Left valve. Otake. P. 131. 

 Fig. 7. Siliqua pnlchella Dkr. Right valve. Ôtake. P. 135. 

 JFigs. 8, 9. Donax introradiatns Pieeve. 8. Left valve. 9. Eiglit valve. Tega. 



P. 136. 

 Pig. 10. Montacnta yamakawai Yok. Right valve. Shisui. P. 158. 

 Figs. 11, 12. Thyasira trigonata Yok. 11. Right valve. 12. Left valve. Shitô. 



P. 158. 

 Figs. 13, 14. Soletellina violacea Lam. 13. Right valve. 14. Left valve. Otake. 



P. 137. 

 Figs. 15, 16. Tellina jedoensis Lischke. 15. Left valve. 16. Right valve. Tega. 



P. 138. 

 Fig. 17. Soletellena olivacea Jay. Right valve. Slütö. P. 138. 



