NORTH AMERICAN CONCnOLOGY. 



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Unio fulvus Lea. 



U. icterinus Conrad, 

 rufusculus Lea. 

 Gibbesianus Lea. 

 sordidus Lea. 

 Dariensis Lea. 

 Congaraeus Lea. 

 neglectus Lea. 

 subplanus Conrad. 

 declivis Say. 



U. geometricus Lea. 

 excultus Conrad. 

 paludicolus Could. 

 Blandingianus Lea. 

 famelicus Gould. 

 circulus Lea. 



Mya rotunda? Wood. 

 lens Lea. 

 unicolor Lea. 

 rubellus Conrad. 

 Masoni Conrad. 

 rotundatus Lam. 

 U. suborbiculata Lam. 

 glebulus Say. 

 subglobosus Lea. 

 personatus Say. 



U. capillaris Lea. 

 retusus Lam. 

 U. torsa Raf. 

 obtusa Cuvier. 

 cordatus (fern.) Kiist. 

 ebenus Lea. 



U. mytiloides Conrad. 

 obliquus Conrad. 

 Gouldianus Ward. 

 Lesuerianus Lea- 

 nucleopsis Conrad. 

 Kirtlandianus Lea. 

 pilaris Lea. 

 dollabelloides Lea. 

 subrotundus Lea. 

 U. politus? Say. 

 brevialis? Crouch. 

 politus Conrad. 



