GEOGRAPHICAL DISTRIBUTION 



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 species from each great divi- 

 sion of the world ; and, to make this more useful, it has been thrown into alphabetic 

 arrangement. 



GENUS MARGARON. 



I. SUBGENUS TRIQUETRA. 



SOUTH AMERICA. 



Brownianus. Lea. 

 corrugata. Lea. 

 subviridis. Klein. 



II. SUBGENUS PRISODON. 



SOUTH AMERICA. 



ambigua. Lam. 

 Dupreyi. Recluz. 



III. SUBGENUS UNIO. 



EUROPE. 



Batavus. Lam. 

 crassus. Retz. 

 elongatus. Pfeif. 

 litoralis. Lam. 

 Petterianus ? Kust. 

 pictorum. Lam. 

 platyrhynchus. Rossmaesler. 

 tumidus. Retz. 



ASIA. 



Bengalensis. Lea. 

 bilineatus. Lea. 

 Bonneaudii. Eyd. 

 caeruleus. Lea. 

 corrugatus. Lam. 

 Corrianus. Lea. 

 cucumoides. Lea. 

 Cumingii. Lea. 

 cultelliformis. Con. 

 delphinus. Gruner. 

 dorsuosus. Gould. 

 exilis. Dunk. 

 exolescens. Gould. 

 foliaceus. Lea. 

 Gray an us. Lea. 

 Guadechaudii. Eyd. 

 Ingallsianus. Lea. 

 Javanus. Lea. 

 Keraudreni. Eyd. 

 lamellatus. Lea. 

 Leaii. Gray. 

 lutulentus. Gould. 

 marginalia. Lam. 

 multidentatus. Phili. 

 mutatus. Mouss. 



