386 



INDIAN CYPRINID^. 



SarcohorincB . 



X. — Systomus malacopterus, J. M. 



t. 44. f. 9. /3. 



Cyp. cosuatis, Buch. 



Koswati of the fishermen. 



Back abruptly arched from the nape to the dorsal, which is somewhat 

 rounded and without a spine ; scales large, and black at their bases ; lower 

 margin of the body uniformly rounded. The fin rays are, 



D.IO: P.15: V.9: A.7: C.i?. 



Colour above greenish, without any distinct spots on the sides, below 

 silvery, ventrals light red, other fins pale ; found by Buchanan in the Kosi 

 river in the north-western parts of Bengal. I have not hesitated to place it 

 in this group, as well from its general characters as from the remark of 

 Buchanan, that the "jaws protrude much in opening." 



The three remaining species are slightly diaphanous, with a chaste and 

 beautiful variety of colour distinctly distributed over the body. The lobes of the 

 caudal are not separated by a deep fissure, thus indicating an affinity to the 

 Perilamps ; and as such peculiarity of form and diversity in the fixed colours 

 indicate in all similar cases throughout the Cyprinidce carnivorous habits and 

 structure, I cannot view these species as an exception to the rule, until they 

 are proved to be so. 



XI. — Cyprinus gelius, Buch. 



t. 44. f. 4. /3. 



Geli pungti of the fishermen. 



Abdomen and a stripe on each side silvery, an irregular black spot 

 extends over the first three or four rays of the dorsal, as well as ventrals and 



