NORTH AMERICAN CONCHOLOGY. 



151 



Page. 



Name. 



Locality. 



14 



Helix personata Lam. 

 H. injlecta Say. 



isognomostomus Gmel. 



OWo. 



15 



Tezasiana Mor. 

 H. triodonta Jan. 



Mexico, 



15 



perspectiva Say. 



Ohio. 



17 



alternata Say. 

 H. scabra Lam. 

 radiata Miill. 



Pennsylvania. 



17 



. pulchella 3Iull. 

 H. minuta Say, &c. 



Pennsylvania. 



17 



arborea Say, 



Ohio. 



17 



concava Say. 



Ohio. 



17 



labyrinthica Say. 



Pennsylvania. 



19 



Achatina australis Mich. 



North America. 



19 



Polyphemus glans Lam: 

 Bulla valuta Gmel. 



Carolina. 



21 



Bulimus zikzak Lam. 



Mexico. 



29 



Helicina zephirina Dud. 



Mexico. 



29 



Berlandieriana Mor. 



Mexico. 



32 



Physa Mexicana Auct. 



Mexico. 



32 



heterostropha Say, 

 P. Cubensis Pfr. 



Ohio. 



33 



Planorbis Mexicanus Auct. f 



Mexico. 



33 



bicarinatus Say. 



Ohio. 



33 



proboscidena Mke. 



Ohio. 



34 



evacuus Say. 



Ohio. 



34 



Ampullaria fasciata Lam. 

 liet. ampullacea Lam. 



Mexico. 



34 



Paludina decisa Say. 



Ohio. 



35 



ponderosa Say. 



Philadelphia. 



35 



subcarinata Smj. 



North America. 



3G 



Littorina Guerini Crist. 



Mexico. 



36 



Melania virginea Say. 



Pennsylvania. 



39 



Neritina reclivata Say, 



Vera Cruz. 



39 



Dreissina cubita Auct. ? 



Carolina. 



40 



Anodonta viridis Ziegl, 



North America. 



40 



cherziana Rang. 



Mexico. 



40 



Iridina rubens Lam. 



Anodonta rubens Lam. 



Clappertoni Koenig. 

 splendens De Crist. 



Mexico. 



41 



Unio rectus Lam. 



U. prxlongus Barnes. 



America. 



