76 Records of the Indian Museum. EVOL, <“vadiir 
anterior semicircular groove on the snout is not strongly developed. 
The mental disk is subcircular and of very large size. It is com- 
pletely surrounded by a granular border. The opercular and pre- 
opercular margins are adherent on the ventral surface. The 
former approach one another at an acute angle and almost meet 
behind the disk. The dorsal fin is higher than the depth of the 
body. The pectorals are large and pointed and have the outer ray 
somewhat expanded. ‘They are nearly as long as the head. 
The colour is dark olivaceous with traces of several paler 
longitudinal streaks on the caudal peduncle. There is a dark 
spot behind the operculum and a dark median streak on the caudal 
fin. The ventral surface is pale. 
Day states that the species grows as long as 5? inches. My 
specimens are about 50 mm. long. 
Distribution.—Day states that the species is abundant at the 
base of the hills in the Bhavani River but rarer in the Sigur. I 
took two males and a female in the Nierolay stream at the base of 
the Nilgiris in August, with a number of specimens of D. stenor- 
hynchus and one of D. jerdont. 
Discognathus elegans, sp. nov. 
(Pl ixene. 42 pl. xk figs15): 
This species is distinguished by its elongate form and by the 
structure of the snout, which bears numerous patches of horny 
tubercles but is not produced between or outside the nostrils. 
The dorsal and ventral profiles of the body and the tail are 
nearly parallel and the depth of the body is contained more than 
six times in the total length. The head is short and rather narrrow, 
its length being contained nearly six times in the total length. The 
snout is more than twice as long as the part of the head behind the 
eye. Its dorsal profile is concave, the posterior transverse groove 
found in certain other species between the nostrils being represented 
by a broad depression. There is a narrow anterior transverse groove, 
which extends backwards on the sides of the head nearly as far as 
the anterior margin of the eye. ‘There are about seven groups of 
horny tubercles on the snout, but some of them may coalesce or 
be subdivided. The nostril is very much nearer the eye than the 
tip of the snout. The eye is of moderate size, invisible from below. 
The snout is rounded in ventral view. The upper lip, which is 
fringed and granular, is relatively small, exposing both jaws. 
There are four very small barbels, those at the angle of the mouth 
being almost vestigial. The mental disk is transverse and lens- 
shaped. ‘There is a narrow band of granular tissue in front of it 
and it is surrounded on three sides by a broad granular free border, 
which is slightly emarginate near the angle of the jaw on each side. 
The opercular borders are practically transverse on the ventral 
surface and are widely separated. The chest, and indeed the 
whole ventral surface, is flat but scaly and without specialized 
muscles. ‘The dorsal fin is higher than the depth of the body; its 
