NORTH AMERICAN CONCHOLOGY. 



251 



29-: 



Name. Locality. 



Unio marginalis Lam. North America, 



U. testudiiun-ius Lea. [&C. 



obliquus Lam. North America. 



ochraceus. North America. 



Symijhiiiota ockracea Lea. 

 U. luteola Lam. 

 inultiplicatus Lea. North America. 



U. Iicro-s Say. 

 purpuratus Lam. 



U. atir Lea. 

 purpurescens Lmm. New York. 



U. purpureus Say. 

 asperrinius /-<«. North America. 



U. qiiaJruUis Raf. 

 tuberculatus Barn. Illinois. 



Margnritanu tuberculatus Sch. 

 Symphinota cristaria Lea ? 

 Cyclas striatina Lmvi. North America. 



Gnathodon cuneatus Gray. Lake Pontciiar- 



Rangia cyrcnoides Des Moul. [train, W. F.,&c. 

 Saxicava Groenlandica Pot. et Mich. Greenland. 

 Helix Troostiana Pfr. Tennessee. 



Polygyra Troostiana Lea. 

 Jo spinosa Lea. 



Clienil. — Illustrations Conchyliologiques ou Description et 

 Figures de toutes les Coquilles connues, &c. &c. : par J. C. 

 "Chenu. Paris. 



[No dates are given. I have already quoted a portion of this work on 

 p. 333 of Part I. It was left in an unfinished state, a large number of 

 plates having appeared without the accompanying text. Very many 

 American species are figured — of the following only are descriptions given. 

 — W. G. B.] 



