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 species from each great 

 division of the world; and, to make this more useful, it has been thrown into alpha- 

 betic arrangement. 



GENUS MA EG A RON. 



I. SUBGENUS TRIQUETRA. 



SOUTH AMERICA. 



Brownianus. Lea. River Amazon, 

 corrugata. Lea. River Amazon, 

 subviridis. Klein. River Amazon. 



ASIA. 



contorta. Lea. Pei-ho river, China. 



II. SUBGENUS PRISODON. 



SOUTH AMERICA. 



truncatus. Schum. River Amazon. 

 Dupreyi. (Unio.) Recluz. Rio Parana, 

 nodulosns (Mja), Wood. Hab. doubtful. 



III. SUBGENUS UNIO. 



EUROPE. 



Batavus. Lam. Various rivers, 

 crassus. Bets. Various rivers, 

 depressus. Lam. North Holland. 

 24 



elongatus. Pfeif. Various rivers, 

 litoralis. Lam. Various rivers. 

 Petterianus? Kust. Montenegro, Greece, 

 pictorum. Lam. Various rivers, 

 platyrhynchus. Rossm. Carynthia. 

 tumidus. Retz. Various rivers. 

 Valentinus. Rossm. Lake Albufera, Spain. 



ASIA. 



abnormis. More. Bankok. 

 asperulus. Lea. Siam. 

 Aucklandicus. Gray. New Zealand. 

 Aveia. Ben. Pulo Penang. 

 Bagdadensis. Bourg. Tigris. 

 Bengalensis. Lea. Rivers of Bengal. 

 Bensonii. Lea. East Indies? 

 bilineatus. Lea. Rivers of Bengal. 

 Bonneaudii. Eyd. 



Bourguignatianus. Lea. River Tigris. 

 Brownii. Lea. Mocha. 

 Bruguierianus. Bourg. Smyrna, 

 cceruleus. Lea. Rivers of Bengal. 

 Cambodiensis. Lea. Takrong river, Siam. 

 Chinensis. Lea. Hong Kong, China, 

 complanatus. Midd. Kamtschatka. 

 consobrinus. Lea. China. 



