THE FAMIIiY NAIADES. 



145 



GEOGRAPHICAL DISTRIBUTION 



OF THE 



SPECIES OF THE FAMILY NAIADES. 



To render the preceding Synoptical Arrangement more complete, it was 

 deemed advisable to make such a table as would throw together the spe- 

 cies from each great division of the world ; and to make this more useful, 

 it has been thrown into alphabetic arrangement. 



GENUS MARGARITA. 



I. SUBGENUS UNIO. 



EUROPE. 



Batavus. Lam. 

 crassissimus. Per. 

 elongatus. Pfeif. 

 litoialis. Lam. 

 ovalis. Flem. 

 pictorum. Lam. 

 platyrhynchus. Rossmaesler. 



ASIA. 



Bengalensis. Lea. 

 bilineatus. Lea. 

 coeruleus. Lea. 

 coirngatus. Lam. 

 Corrianus. Lea. 

 • VI. — 2 M 



Grayanus. Lea. 

 lamellatus. Lea. 

 Leaii. Gray. 

 marginalis. Lam. 

 Murchisonianus. Lea. 

 olivariu8. Lea. 

 ponderosus. Lea. 

 tigris. Fer. 



AFRICA. 



divaricatus. Lea. 

 Egyptiacus. Cailliaud. 

 Niloticus. Fer. 



NORTH AMERICA. 



acudssimus. Lea. 

 Msopxxs. Green. 



