Perilampus. INDIAN CYPRINID#. 395 
aperture. The usual septum which appears to divide the nostrils of Cyprinide 
into two is in this species placed somewhat horizontally so as to form a valve, 
in which however there is a second aperture. 
The head is small, the mouth obliquely raised, the tongue large, and a 
pointed process is placed on the apex of the upper jaw, with two prominent 
obtuse points on the lower one; the depth of the body is equal to about a 
third of the length, the pectorals are long, the ventrals very small, the body 
inferiorly much compressed, the post-operculum triangular, with a green spot 
on either side above the base of the pectoral fins. The fin rays are, 
D.10: P.12:V.7: A.24:C.2. 
The lateral line descends low along the sides, and beneath it the scales are 
small, thirty-four in a row on either side, and about seven from the lateral line 
to the base of the dorsal fin ; dorsal and anal opposite. 
The stomach and intestine together are scarcely equal to the length of the 
body. 
V.—PERILAMPUS PERSEUS, J. M. 
t. 48. f. 5. 
This species presents all the peculiar characters of the Perilamps, in the 
most prominent degree. The head is small, the back straight from the snout 
to the caudal, and the mouth may be said to be placed in the upper part of 
the head so as to be carried along the surface of the water when swimming. 
The pectorals and ventrals are very long, and each side of the body is marked 
with a light blue streak. The fin rays are, 
D9: P.18:V.5: A.2l: C.—? 
The caudal is much divided, but the only specimen in my possession is so 
much injured that I am unable to determine with accuracy the number of 
scales and caudal fin rays. 
