NORTH AMERICAN CONCHOLOGY. 



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Page. Plate. 

 56 



Fig. 



57 



58 



58 



67 



Name. Locality. 



Glandina truncata Say, e. 1. S. C. & Florida. 



Planorbis glans Say. 



Auriculiadac. 



92, 1 — 3 Auricula bidentata Say. 



Melampus bidcntatus Say. 

 A. cornea Lam. 

 91, 93 denticulata Montagu. 



Voluta denticulata Mont. 

 A. personata Lam. 

 borealis Conrad. 

 obliqua .Say, e. 1. Charleston. 



Limniadae. 



Planorbis trivolvis Say. 

 bicarinatus Say. 

 lentus Say. 

 megastoma De Kay. 

 campanulatus Say. 

 obliquus De Kay. 

 armigerus Say. 



Discus armigerus Ilald. 

 exacutus Say. 

 parvus Say. 

 corpulentus Say. 

 hirsutus Gould. 

 elevatus Adams. 

 deflectus Say. 

 dilatatus Gould. 



P. lens Lea? 

 glabratus Say, e. 1. Sontb Carolina. 



antrorsus Conrad, e. 1. Alabama, 



virens Adams, e. 1. Vermont. 



Limnea catascopium Say. 



L. pinguis Say ? 

 decollata Adams, 

 fragilis Linn. 



Helix fragilis Linn. 



Limnea elodes Say. 

 umbrosa Say. 



Limneus elongatus Say. 

 caperata Say. 



L. umbilicata Adams. 

 pallida Adams. 

 megasoma Say. 



68 



