386 INDIAN CYPRINID. Sarcoborine. 
X.—SysToMus MALACOPTERUS, J. M. 
t. 44. £. 9. 6. 
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.10: P.15: V.9: A.7: C4. 
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 Cyprinidé carnivorous habits and 
structure, I cannot view these species as an exception to the rule, until they 
are proved to be so. 
XI.—Cyprinus GE.tIus, Buch. 
t. 44. f. 4. B. 
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 
