Plate II. 



Vig. 1 ab. Crassatella fusca n. sp. A specimen showing a rounded 

 edge running from the beak to the postero-ventral angle 

 owing to a pressure on the other parts of the shell. INIiikc. 



Fig. 2 a. Do. Right valve showing two divergent teeth. 2 b. The 

 same showing the lunula. Miike. 



Fig. 3 ab. Do. A normal form. Miike. 



Fig. 4. Do. Inner cast. Haugochi. 



Fig. 5. Do. Left valve showing the hinge and the inner surface. Miike. 



Fig. 6 ab. Do. A somewhat worn specimen. Miike. 



Fig. 7. Fusus sp. Miike. 



Fig. 8-11. Cardita mandaica u. sp. Miike. 



