Shells. 561 



Cardita Brug. 



borealis, Say. 

 Area Lin. 



pexata, Say. 



one or more other species. 

 Nucula Lam. 



proxima, Say. 



limatula, Say. 

 Unio Brug. 



complanatus, Soland. 



and others. 

 Anadonta Brug. 



one or more species. 

 Alasmadonta Say. 



margaritifera, Gmel. 



and others. 

 Modiola Lam. 



plicatula, Lam. 



one or more other species. 

 Mytilus Lin. 



edulis, Lin. 

 Pecten Brug. 



magellanicus, Gmel. 



Pealeii, Conrad. 



concentricus, Say. 

 Ostrea Lin. 



one or more species. 

 Anomia Lin. 



ephippium, Gmel. 



and another. 

 Chiton Lin. 



marginatus, Lin. 

 Patella Lin. 



amoena, Say. 



alveus, Conrad. 



a third ? 

 Dispotea Say. 



striata, Say. 

 Crepidula Lam. 



fornicata, Gmel. 



convexa, Say. 



plana ? Say. 



glauca ? Say. 

 Bulla Lin. 



one or more species. 

 Helix Lin. 



albolabris, Say. 



alternata, Say. 



thyroidus, Say. 



2 or more other species. 

 Succinea Draparnaud. 



2 or more species. 

 Planorbis Brug. 



2 or more species. 

 71 



