26 Animals in Massachusetts. 



Cardium. 



Mortoni, Conrad, 

 pinnulatum, Con. 

 Cardita. 



borealis, Conrad. 



Area. 



ponderosa. Say. 



pexata, Say. 



transversa, Say. 

 Nucula. 



margaritacea, Lam. 



rostrata, Montague. 

 Unio. 



complanatus, Soland. 



nasutus. Say. 



ochraceus, Say. 



radiatus, Lea. 

 Alasmodonta. 



arcuata, Barnes. 



marginata, Say. 



undulata, Say." 

 ■ Anodonta. 



cataracta, Say. 



marginata, Say. 



lugubris, Say. 



ORDER II.— UNIMUSCULOSA. 



Modiola. 



papuana, Lam. 



plicatula, Lam. 



glandula, Totten. 

 Mytilus. 



edalis, Lin. 



tmgulatus, Humboldt. 



incurvatus, Maton. 



pellucidus, 

 Pecten. 



Magellanicus, Lam. 



Islandicus, Lam. 



concentricus, Say. 

 Ostrea. 



Canadensis, Lam. 



Virginica, Lam. 



edulis, Lin. Var. 

 Anomia. 



ephippium, Lin. 

 Terebratula. 



an undescribed recent species. 



CLASS XII.— MOLLUSCA. 

 ORDER II.— GASTEROPODA. 



Chiton. 



one species. 

 Patella. 



alveus, Conrad. 



amoena, Say. 

 Crepidula. 



fornicata, Say. 



glauca, Say. 



