20 INDIAN FRESH- WATER FISHES. 



Genus Schizothorax. Mountain streams, Cashmere, 

 and Afghanistan. 



Genus Leuciscus. Temperate and Arctic Eegions, 

 Europe, N. America, Persia, Anatolia. 



Genus Barilius. India, East Africa, Eiver Nile. 



The Cyprinidse, being exclusively fresh- water fishes, 

 and also being very numerous, and containing several 

 large genera, are well adapted to elucidate this 

 subject. 



We find some genera that are frequenters of 

 temperate and cold climates, and others that can only 

 exist in tropical climates. The genus Leuciscus, for 

 instance, is spread over the North of Europe and 

 North America, not extending into Indian waters. 



The genus Labeo, on the other hand, is found in 

 tropical Africa and the East Indies only. 



Some genera are confined to North America, 

 occasionally spreading, as in genus Sclerognathus, 

 into China via N.E. Asia. The large genus Barbus 

 is found all over Europe, Asia, and Africa, but does 

 not occur in America. 



Most of the genera that inhabit the continent of 

 India, extend also to the East Indian Archipelago, 

 Java, and Sumatra. 



Those Indian genera that inhabit mountain streams, 

 such as Discognathus and Schizothorax, are also 

 found in Afghanistan and Persia, but there seems no 

 community between the fishes of India, and those 

 of Northern Asia. The snowy ranges of the 

 Himalayas seem to present an impassable barrier. 



