C!ypriiiidee. 



Astarte castanea, Sai/. 

 Astarte sulcata, Mont. 

 Astarte semisulcata, Leach. 

 Astarte quadrans, Old. 



* Astarte elliptica, Ilunl. 



* Astarte Banksii, Leach. 



* Astarte crebricostata, Forh. 



* Astarte Portlandica, Migh. 



* Grouldia mactracea, L^insley. 



* Cyprina Islandica, Larn. 



VeneridaBo 

 Cytherea convexa, Sai/. 

 Venus mercenaria, Lin. 

 Venus notata, Say. 

 Tapes fluctuosa, Gld. 

 Gemma gemma, Totten. 



* G-emma Manliattensis, Prime. 



Cai-diadae. 



Cardium Islandicum, Lam. 



* Cardium elegantulum, Beck. 

 Cardium pinnulatum, Conr. 



* Liocardium Mortoni, Conr. 



* Aphrodite Groenlandicnm, Chemn. 

 Cardita borealis, Conr. 



Arcadae. 



Area pexata, Say. 



* Area transversa, Say. 

 Nucula tenuis, Mont. 

 Nucula proxima, Say. 



* Nucula expansa, Reeve. 



* Nucula inflata, Hanc. 



* Nucula delphinodonta, Mighels. 

 Yoldia limatula, Say. 



* Yoldia obesa, St. 



* Yoldia siliqua, Reeve. 

 Yoldia thracieeformis, Storer. 

 Yoldia sapotilla, Ghl. 



* Yoldia myalis, Couth. 



* Leda tenuisulcata, Couth. 

 Leda Jacksonii, Gld. 



* Leda minuta, Mont. 



* Leda caudata, Lor en. 



