Plate VII. 



Figs. 1, 2. Cryptoinya busoensis Yok. 1. Kiglit valve. 2. Loft valve, a shows depth. 



Ötake. P. 126. 

 Fig. 3. Corbula substriata Yok. Eight valve. Shitö. P. 125. 

 Figs. 4, 5. Corbnla pygmaea Yok. 4. Right valve, a shows depth. 5. Left valve 



Tega. P. 125. 

 Fig. 6. Mactra snlcataria Desh. Shitö. P. 126. 



Figs. 7, 8. Mactra dankeri Yok. 7. Riglit valve. 8. Left valve. Sliitô. P. 128. 

 Figs. 9, 10. Mactra sachaUneiisis Sehr. var. imperialis Y''ok. | nat. size. 9. Broad 



and triangular form. Shito. 10. Higher and more ovate form. Ötake. 



P. 129. 

 Fig. 11. Soletellina olivacea Jay. Left valve. Shitö. P. 138. 

 Fig. 12, 18. Mactra ovalina Lam. 12. Left valve. Ötake. IB. Eight valve. Tega. 



P. 127. 



