66 



7 T. quadriradiata. 



8 T. radiata. 



9 T. rotunda ta. 



10 T. textrix. 



11 T. virginea. 



GENUS. VEISTERUPIS. Lamarck, 1818. 

 1 V. Irus. Linnaeus. Britain. 



GENUS. CYPRICARDIA. Lamarck, 1819. 

 1 C. vellicata. Reeve. Philippines. 



FAMILY 1 1 . PETRICOLID^E. 

 GENUS. PETRICOLA. Lamarck, 1801. 

 1 P. lithophaga. Retzius, Mediterranean. 



FAMILY 12.-GLAUCONOMYID2E. 

 GENUS. GLAUCONOMA. Gray, 1828. 

 1 G. rugosa. Hanley. Malacca. 



FAMILY 13. CYPRIKED.E. 

 GENUS. CYPRINA. Lamarck, 1812. 

 1 C. islandica. Lamarck. Britain. 



FAMILY 14 CYRENIDJE. 

 GENUS. CYRENA. Lamarck, 1806. 



SirW.Denison. 



Mr.W.T.Blanford. 



M.J.L.Laporte 



1 P. dubium. 



2 P. pusillum. 



GENUS. PISIDIUM. Pfeiffer, 1821 

 Say. America. 



Gmelin. 



Britain. 



