20 



Animals in Massachusetts. 



Mactra. 



tellinoides, Conrad. 

 Solemya. 



velum, Say. Not uncommon at N. Bedford. 

 Amphidesma. » 



corbuloides. My a Norwcgica, Wood and Dillimjn. 



M. hyalina) Conrad. 

 Corbula. 



ferruginosa. Mya ferruginosa, Wood. Not described by La- 

 marck. 

 Pandora. 



trilineata, Say. Found in Nantucket Harbor. 

 Petricola. 



pholadiformis, ham.fornicata, Say. Very common. 



Sanguinolaria. 



fusca, Conrad. At Nantucket. 

 Tellina. 



polita, Say. Found at N. Bedford. 

 Lucina. 



divaricata. A single valve found at Chatham. Astarte casfanea. Say. 



Ocean shore at Nantucket. 

 Astarte — a distinct species, with margins entire. 

 Cyprina. 



Islandica. Venus Islandica, L. Common in Essex 



[County. 



Venus. 



mercenaria. Common Quahog or Round Clam, 

 praeparca, Say. 

 notata, Say. 

 Cardium. 



Mortoni, Conrad. Very common at New Bedford, 

 pinnulatum, Conrad. 

 Cardita. 



This species appears to be undescribed. 

 Area. 



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

 pexata, Say. \ point, on the ocean shore of Nantucket, 

 transversa, Say.Not uncommon in Buzzard's Bay. 

 Nucula. 



margaritacea. Nucula proxima, Say. Area nucleus L, 

 rostrata, Montague, limatula, Say.' 



ORDER II.— UNIMUSCULOSA. 

 Modiola. 



papuana. My tilus modiolus., L. 

 Mytilus. 



edulis. 



ungulatus. 



pellucidus. 



incurvatus. 



demissus. Very abundant at New Bedford. 



