NORTH AMERICAN CONCHOLOGY. 



83 



Pa. Fig. 



34 p. 24 Machaera costata Say. 



Solen costatus Say. 

 Solecurtus costatus Say. 



35 Solemya velum Say. 



36 borealis Tott. 



S. velum Conr. 



Pa. 



37 



39 



Fig. 



27 



Panopeea arctica Lam. 



Ghjcymcris arctica Lam. 

 Glycymeris siliqua Chemn. 



Mya siliqua Cliemu. 



G. incrassata Lam. 



Mya picea Wood. 



40 



42 



Mya arenaria Lin. 



M. mercenaria Say. 

 acuta Say. 

 truncata Lin. 



Family Myaria. 



43 37 Corbula contracta Say. 



44 Pandora trilineata Say. 

 P. nasuta Sowerby. 



Family Osteodesmacea. 



46 10 Osteodesma hyalina Conr. 



Mya hyalina Conr. 

 Lyonsia hyalina Conr. 



47 28 Anatina papyracea Say. 



A. papyratia? Totten. 

 A. fragilis Totten. 



49 29, Cochlodesma Leana Conr. 

 30 Anatina Leana Cour. 



50 Thracia Conradi Couth. 



T. declivis Conr. 



Anatina convexa Hitch.. Cat. 



51 



53 32 



54 34-5 



56 36 



57 39 



Family Mactracea 

 Mactra solidissima Chemn. 

 M. gigantea Lam. 



iuteola Loven (young), 

 ovalis Gould. 58 38 



M. similis Gray. 59 



grandis Desh. 

 lateralis Say. GO 33 



Cumingia tellinoides Conr. 



Mdctra tellinoides Conr. 

 Mesodesma arctata Conr. 



Lam. 



Mactra arctata Conr. 

 deaurata Conr. 

 suhtriangulata Conr. 

 Mesodesma Jauresii De Joan. 

 Montacuta bidentata Mont. 



Mya hidcnlala Mont. 

 Kellia rubra Mont. 



Cardium ruhrum Mont. 



Iseve Walker. 



Tellina rubra Turton. 



Family Lithophagida; Lam. 



61 



40 Sasicava distorta Say. 

 Mytilus rugosus Lin. 



63 



65 41 



Petricolapholadiformia Lam. 



P. fornicnta Say. 

 dactylus Soiob. 



Family IVympliacea Lam. 



66 42 



Sangulnolaria fusca Say. 



67 43 





Psammobia fusca Say. 



68 44 





Tellina inconspicua? Sowb. 



69 





Gronlandica Beck. 







Ballhica Lin. 





67 



sordida Couth. 



I'cllina sordida Couth. 





Tellina tenta Say. 



tenera Say. 

 Lucina radula Mont. 



Tellina radula Mont. 



Venus borralis Donovan. 



Venus spuria Dillwyn. 



Pectunculus subfuscus Lister. 



