NORTH AMERICAN CONCHOLOGY. 



83 



Pa. Fig. 



34 p. 24 Machaera costata Say. 



Solen costatus Say. 

 Solecurtus costatus Say. 



35 Solemya velum Say. 



36 borealis Tutt. 



S. velum Coiir. 



Pa. Fig. 



37 27 Panopaea arctica Lain. 



Glyeymeris arctica Lam. 

 39 Glyeymeris siliqua Chemn. 



Mya siliqua Chemn. 



G. incrassata Lam. 



Mya picea Wood. 



40 Mya arenaria Lin. 



M. mercenaria Say. 

 acuta Say. 

 42 truncata Lin. 



Family Myaria. 



43 37 Corbula contracta Say. 



44 Pandora trilineata Say. 

 P. nasuta Sowerby. 



Family Osteodesniacea. 



46 10 



47 28 



Osteodesma hyalina Conr. 



Mya hyalina Conr. 



Lyonsia hyalina Conr. 

 Anatina papyracea Say. 



A. papyratia? Totten. 



A. fragilis Totten. 



49 29, Cochlc-desma Leana Conr. 

 30 Anatina Leana Conr. 



50 Thracia Conradi Couth. 



T. declivis Conr. 



Anatina convexa Hitch.. Cat. 



Family Mactracea Lam. 



51 



53 32 



54 34-5 



56 36 



57 39 



Mactra solidissima Chemn. 

 M. gigantea Lam. 



luteola Loven (young). 

 ovalis Gould. 

 M. similis Gray. 

 grandis Desk. 

 lateralis Say. 

 Cumingia tellinoides Conr. 



Mactra tellinoides Conr. 

 Mesodesma arctata Conr. 



Mactra arctata Conr. 

 dcaurata Conr. 

 subtriangidata Conr. 



58 38 Mesodesma Jauresii De Joan. 



59 Montacuta bidentata Mont. 



Mya bidentata Mont. 



60 33 Kellia rubra Mont. 



Cardium rubrum Mont. 

 laeve Walker. 

 Tellina rubra Turton. 



Family Litltopliagida? Lam. 



61 40 Saxicava distorta Say. 

 Mytilus rugosus Lin. 



63 Petricola pholadiformis Lam. 



P. fomicata Say. 

 65 41 dactylus Sowb. 



Family IVynipliacea Lam. 



66 42 



67 



Tellina tenta Say. 



tenera Say. 

 Lucina radula Mont. 



Tellina radula Mont. 



Venus borealis Donovan. 



Venus spuria Dillwyn. 



Pectunculus subfuscus Lister. 



