Plate XI. 



Fig. 1. Macoma secta Conrad. Left valve. Ütake. P. 148. 



Figs. '2, a. Gliione munlaiieiisis Smith. '2. Eight valve. 3. Left valve. Shitô. 

 P. 150. 



Fig. 4. Meretrix meretiix Liuiie. Left valve. Otake. P. 140. 



Fig. 5. Meretrix (Callista) chiueusis Chem. Plight valve. Shitö. P. 146. 



Figs. 6, 7, 8. Suiietta excavata Hanley. G ab. Left valve from Kioroshi; formerly 

 coiisitlered to be a different species under the name of S. meustraalis 

 Meuke. 7. A young left valve from Otake (typical S. excavata). 8. A 

 young right valve of menstrualis-type from Otake. P. 147. 



Figs. 9, 10. Venus neastartoides Yok. Kioroshi. 9 ab. left valve. 10. Eight 

 valve. P. 149. 



Figs. 11, 12. Venus stimpsoni Gould. Otake. 11. Left valve. 12. Eight valve. 

 P. 148. 



