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556 Animals in Massachusetts. 



Venus praeparca, Say'. 

 Venus notata, Say. 

 Cardium Mortoni, Conrad. 



Very common at N. Bedford. 

 Cardium pinnulatum, Conrad. 

 Cardita. 



This species appears to be undescribed. 

 Area ponderosa, Say. ) These were found at Smith's point, 

 Area pexata, Say. $ on the ocean shore of Nantucket. 

 Area transversa, Say. 



Not uncommon in Buzzards Bay. 

 Nucula margaritacea. 



Nucula proxima of Say. 



Area nucleus of Linn. 

 Nucula rostrata, Montague. 



N. limatula of Say. 



ORDER II. UNIMUSCULOSA. 



Modiola papuana. 



Mytilus modiolus of Lin. 

 Mytilus edulis. 

 Mytilus ungulatus. 

 Mytilus pellucidus. 

 Mytilus incurvatus. 

 Mytilus demissus. 



Very abundant at N. Bedford. 

 Pecten magellanicus. 



Rare in Mass. Common at Eastport, Me. 

 Pecten Islandicus. 



P. Pealeii of Conrad, Rare. 

 Pecten concentricus, Say. 



Common Scallop. 

 Ostrea Virginica. 



Common Oyster. 

 Anomia ephippium. 



Abundant in N. Bedford. 

 Anomia undulata. 



Is it a distinct species from the preceding? 



CLASS XII MOLLUSCA. 

 ORDER II. GASTEROPODA. 



Chiton. 



Found ot Nautucket. Not described to my knowledge. 

 Patella alveus, Conrad. 

 Patella amoena, Say. 

 Crepidula fornicata, Say. 



Very commou on our coast. 

 Crepidula glauca, Say. 

 Crepidula plana, Say. 



Found in Nantucket Harbor. 



ORDER III. TRACHELIPODA. 



Velutina rupicola, Conrad. 

 Bull a solitaria, Say. 



Found at Martha's Vineyard. Rare. 

 Natica duplicata, Say. 

 Natica heros, Say. 

 Natica triseriata, Say. , 



