NORTH AMERICAN CONCHOLOGY. 

 AMPHIBIOUS. 



43 



Page. 



23 Succinea ovalis Say. 



23 campestris? Say. 



And one species not ascertained. 



23 Pupa corticaria? Say. 

 23 Caracolla. 



One species not ascertained. 



Catalogue of Boston Society of N'atural History. (Tide p. 39.) 



Class XI. COMCHIFEKA Lam. 

 Order I. Bimusculosa. 



Astarte castanea Say. 

 Cyclas similis Say. 



dubia Say. 

 Cyprina Islandica Lam. 

 Cytherea convexa Say. 

 Venus mercenaria Lin. 



praeparca Say. 



notata Say. 



gemma Totten. 

 Cardium Mortoni Conrad. 



pinulatum. Conrad. 

 Cardita borealis Conrad. 

 Area ponderosa Say. 



pexata Say. 



transversa Say. 

 Nucula margaritacea Lam. 



rostrata Montayue. 

 Unio complanatus Soland. 



nasutus Say. 



ochraceus Say. 



radiatus Lea. 

 Alasmodonta arcuata Barn. 



marginata Say. 



undulata Say. 

 Anodonta cataracta Say. 



marginata Say. 



lugubria Say. 



25 



Solen ensis Lin. 



25 



25 



viridis Say. 



25 



25 



Solecurtus Caribaeus Blain. 



25 



25 



maximus. 



25 



25 



CO status Say. 



25 



25 



fragilis Pulteney. 



25 



25 



Glycimeris siliqua Lam. 



25 



25 



My a mercenaria Lin. 



25 



25 



Anatina Leana Conrad. 



25 



25 



convexa. 



26 



25 



Mactra gigantea Lam. 



26 



25 



lateralis Say. 



26 



25 



arctata Conrad. 



26 



25 



tellinoides Conrad. 



26 



25 



Solemya velum Say. 



26 



25 



borealis Totten. 



26 



25 



Amphidesma corbuloides 



26 





Lam. 



26 



25 



Corbula ferrugiuosa Wood. 



26 



25 



contracta Say. 



26 



25 



Pandora trilineata Say. 



26 



25 



Sazicava distorta Say. 



26 



25 



Petricola pholadiformis 



2G 





Lam. 



26 



25 



dactylus Say. 



26 



25 



Sanguinolaria fusca Conrad. 



25 



25 



Tellina polita Say. 



26 



25 



Lucina divaricata Lam. 





Order II. 



26 Modiola papuana Lam. 

 26 plicatula Lam. 



26 glandula Totten. 



26 Mytilus edulis Lin. 



Unimusciilosa. 



26 Mytilua ungulatus Humboldt. 



26 incurvatus Maton. 



26 pellucidus. 



26 Pecten Magellanicus Lam. 



