NORTH AMERICAN CONCHOLOGY. 



42^ 



[Proceedings of the Amer. Phil. Society of Philad. — continued.] 



Lymnea rustica Lea. 



plica Lea. 



coarctata Lea. 



casta Lea. 



parva Lea. 



curta Lea. 



strigosa Lea. 



Kirtlandiana Lea. 

 Paludina regularis Lea. 



obtusa Lea. 



Troostiana L^ea. 

 Anculosa Troostiana 



gibbosa Lea. [Lea. 



dentata Lea. 



variabilis Lea. 

 Amnicola orbiculata 



parva Lea. [Lea. 



Io tenebrosa L,ea. 



Notes on parturition, &c, 

 of Uniones. 



Valvata bicarinata Lea. 

 Unio Brumleyanus Lea. 



regularis Lea. 



mcestus Lea. 



sparsus Lea. 



argenteus Lea. 

 Helix Mobiliana Lea. 



minutissima Lea. 

 Melania turgida Lea. 



glabra Lea. 



perfusca Lea. 



picta Lea. 



impressa Lea. 



robusta Lea. 



Jayana Leu. 

 Anculosa rubiginosa 



bella Lea. [Lea. 



Griffithiana Lea. 



tuberculata Lea. 

 Valvata bicarinata Lea. 

 Paludina angulata Lea. 



Coosaensis Lea. 



cyclostomataformis 

 Lea. 



Melania altalis Lea. 



Unio Foremanianus 

 Haleianus Lea. [Lea. 

 Dariensis Lea. 



