NORTH AMERICAN CONCHOLOGY. 



127 



Page. 



Anodonta areolata Swains. 



fluviatilis Dill icy ». 



Housatonica Linsley. 



implicata Say. 



marginata Say. 



undulata Say. 



subcylindracea Lea. 

 Modiola discors Lam. 



glandula Totten. 



modiolus Turton. 



nexa Gould. 



plicatula Lam. 

 Mytilus edulis Linn. 



striatus De Kay. 



M. pdlucidus Pennant. 

 Pecten concentricus Say. 



Islandicus Chemn 



fuscus Linsley. 

 Ostrea borealis Lam. 



costata De Kay. 



Virginica Gmel. 

 Anomia aculeata Gmel. 



electrica Linn. 



ephippium Linn. 



squamula Linn. 

 Chiton fulminatus Couth. 

 C. Iseviyatus Fleming? 



ruber Lsotve. 



Patella ? 



Lottia alveus Conr. 



testudinalis Mailer. 

 Crepidula alata Lea. 



convexa Say. 



depressa Say. 



fornicata Lam. 



glauca Say. 



plana Say. 

 Ancylus fuscus Adams. 



rivularis Say. 



tardus Say. 

 Bulla debilis Gould. 



insculpta Totten. 



obstricta Gould. 



oryza Totten. 



triticea Couth. 



