560 



Shells. 



Pholas Lin. 



one or more species. 

 Solen Lin. 



ensis, Lin. 



viridis, Say. 

 Solecurtus Elain. 



cariboeus, Lam. 



costatus, Say. 



fragilis, Dill, centralis of Say. 

 Mya Lin. 



mercenaria, Lin. 



hyalina, Conrad. 

 Anatina Lam. 



convexa, Wood. A. Thraoia ? of Blaia, 



leana, Conrad. 

 Mactra Lin. 



solidissima, Chcm. 



lateralis, Say. 



arctata, Conrad. 



tellinoides, Conrad. 



one or more other species. 

 Solemya Lam. 



velum ? Say. 



one other species. 

 Corbula Lam. 



contracta, Say. 

 Pandora Lam. 



trilineata, Say. 

 Saxicava Lam. 



distorta, Say. 

 Petricola Lam. 



pholadiformis, Lam. 

 Sanguinolaria Lam. 



fusca, Say. 

 Tellina Lin. 



two or more species. 

 Lucina Brug. 



divaricata, Gmel. 



and a larger species. 

 Astarte Sowerby. * 



castanea, Say. 

 Cyclas Brug - . 



two or more species. 

 Cyprina Lam. 



Islandicai Lin, 

 Cytherea Lam. 



convexa, Say. 

 Venus Lin. 



mercenaria, Lin. 



notata, Say. 

 Cardium Lin. 



Mortoni, Conrad. 



pinnulatnm, Conrad. 



