188 BULLETIN OF THE 



Order LYOPOMATA. 



Family CRANIIDiE. 



CRANIA RetziiM. 

 Crania Fourtaleoii Dall. 



B. MOLLUiJiCA VERA. 



Class PELECYPODA. 

 Family PECTINIDJE. 



PECTEN Miiller. 



Subgenus JANIRA Schumacher. 

 Janlra hemicyclica Ravenel. 



Subgenus AMUSIUM Schumacher. 

 Amusitun Dalli Smith. 



Section Pkopeamcsicm De Gregorio. 



Amusiuin Poortalesianum Dall. 



Amusitun Pourtalesianum, var. striatulum DalL 



Amusium Pourtalesisinum, var. marmoratum DalL 



Amusium cancellatum Smith. 



Amusium Hoskynsi Forbes.* 



Amusium Holmesii Dall. 



Amusium Sayanum Dall. 



Amusium alaskensis Dall.* 



Subgenus PECTEN s. a 



Pecten magellanicus Gmelin. 

 Pecten caurinus Gould. 

 Pecten nucleus Bom. 

 Pecten dislocatua Say. 

 Pecten phrygium Dall. 

 Pecten ezasperatus Sowerby. 

 Pecten ornatus Lamarck. 

 Pecten antillarum Rdcluz. 

 Pecten effluens Dall. 



