Plate X. 



Fig. 1. Teilina venulosa Schrenck. Left valve. Otake. P. 189. 



Figs. 2, 3. Macoiua pmetexta Mai t. 2. Eight valve. 3. Left valve. Sijisui. 

 P. 142. 



Fig. 4. Macoma dissinüilis Mart. Left valve. Otake. P. 143. 



Figs. 5, 6. Tellina alternata Say var. chibaua Yok. 5. Left valve from Otake. 6. 

 ßigbt valve from Kameuari. P. 140. 



Fig. 7. Lncinopsis divaricata Lischke. Left valve, a shows deptli. Shito. P. 145. 



Figs. 8, 9, 10. Tellina delta Yok. 8. Eight valve. 9. Left valve. 10. Seen from 

 beak-side. Otake. P. 141. 



Fig. 11. Astarte borealis Chem. Left valve. Somewhat enlarged (X I', ). a. In- 

 side, b. Outside. Shito. P. 1G3. 



Figs. 12, 13. Dosinia bilunulata Gray. 12. Left valve. 13. Eight valve. Otake. 

 P. 144. 



