Plate XII. 



Figs. 1, 2. Veuerapis semipurpurea Dkv. 1. Left valve. 2. Right valve (a form 

 more truncate both in front and behind). Otake, P. 151. 



Fig. 3. Cardium bnrchardi Dkr. Eight valve. Otake. P. 153. 



Figs. 4, 5, 6. Cardium tokunagai Yok. 4. Var. ovata. Shisni. 5, 6. Typical 

 forms. Otake. P. 156. 



Fig. 7. Cardixim muticum. Reeve. Right valve. Otake. P. 154. 



Fig. 8. Tapes euglyptns Phil. Left valve. Kioroshi. P. 152. 



Fig. 9. Saxidomus purpuratus Sow. Right valve. Otake. P. 153. 



