Pulmonifera of Maine. 47 



U N I O N I D ^ . 

 Anodonta fluviatilis, Lea. 



Common in quiet muddy ponds, and artificial bodies of water. 



Anodonta marginata, Say. 

 Not common. 



Anodonta implicata, Say. 



Strophitus undulatus, Say. 



Strophitus sculptilis, Ag. 



Aiasmodonta marginatus, Say. 



Margaritana arcuata, Barnes* 



Found in great numbers in several rocky muddy brooks near 

 Portland. Have rarely found it in the interior, 



Lampsilis ochracea, Say. 



A few specimens of this species has been found in the Penob- 

 scot River. 



Lampsilis radiata, Say. 



Common throughout the State ; inhabiting large ponds. Some 

 forms resemble closely the Lampsilis siliquoidea. 



Unio complanatus, Lea. 



A very common species in all bodies of water. Extremely 

 variable in its external characters, almost every pond in the State 

 exhibiting some form of this species peculiar to its waters. 



CORBICULID^. 

 SphaBrium sulcatum, Lam. 



Ilallowell, Maine. {Prime.) 



