32 



SYNOPSIS OF 



O 

 I— ( 



o ^ 

 ^< 

 >^ 



I 



o 

 12; 



o 



I/) 



OBLONG. 



fulvus. Zert. 



Unio iQteriiius. Con. 



Congarseus. Lea. 



declivis. Say. 



Unio geometricus.* Lea. 



Blandingianus. Lea. 



depressus. Lam. 



angustus. Lam. 



modestus. Fer. 



litoralis. Lam. Pfeif. Des Moid. Grat. 

 Unio crassus.t Schr. Retz. Neil. Speng. 

 Unio rhomboidea.t Schr. 

 Unio brevialis. Lam. 

 Unio semirugata. Lam. 

 Unio nana. Lam,. 

 Unio subtetragona. Mich. 

 Unio incurvus. Lea. 

 Unio Pianensis. Farines. 

 Unio granosus. Schum,. 

 Mysca ovata. Turf. 

 My a depressa. Do7i. 



* I do not find either of these names in Mr. Say's Synonymy. He has, 

 however, priority. 



■\ On the authority of Ferussac. 



