Plate IX. 



Fig. 1. Venerupis irtis L. Enlarged. Right-valve, a. Outer view. b. linier 



view. Yokosnka. p. 123. 

 Figs. 2, 3. Venerupis insignis Dcsb. 2. Bight-valve. Otsu. 3. Left valve. Yoko- 



suka. a. Outside, b. Inside, p. 124. 

 Figs. 4, S. Tapes variegatus Haul. Magnified. 4. Eight valve. 5. a. b. Left 



valve. Kami-Miyata. p. 125. 

 Fig. 6. Tapes pbilippinarum Ad. et Eve. Eight valve, a. Outside, b. Inside. 



Otsu. p. 125. 

 Fïg. 7. Tapes aruabilis Phil. Eigbt valve, a. Outside, b. Inside. Naganuma. 



p. 126. 

 Figs. 8, 9. Saxidomus purpuratus Sow. 8. Eight valve. 9. Left valve. Yokosuka. 



p. 127. 

 Fïg. 10. Cardiurn californiense Desh. Left valve, a. Outside (somewhat reduced). 



b. Inside. Kami-Miyata. p. 127. 

 Fig. 11. Cardium muticum Eve. Bight valve, a. Outside, b. Inside. Okine. p. 128. 

 Figs. 12, 13. Cardium modestum Ad. et Eve. 12. a. b. Left valve. 13. Eight 



valve. Koshiba. p. 126. 

 Figs. 14, 15, 16. Diplodonta usta Conr. 14. Eight valve. 15. Left valve. 16. 



Eight valve. Kami-Miyata. p. 130. 



