1865. ] MR. F. DAY ON THE FISHES OF COCHIN. 305 
Length of specimens from 2,%, to 3,8; inches. 
Length of head 1, of pectoral 4, of base of dorsal zl5, of base of 
anal ;';, of caudal + of the totallength. Height of head 4, of body 4, 
of dorsal +, of anal } of the total length. Diameter of eye nearly 4 
of the length of the head, eyes a little above 4 a diameter from the 
end of snout, 1 diameter apart ; its under surface is as close to lower 
profile as its upper surface is to the margin of the head. 
Profile rises gradually from snout to posterior extremity of the 
head ; thence there is a gradual decline to the caudal. Abdominal 
surface rather more curved than the dorsal. Sides compressed. 
Head compressed from side to side. Snout broad, depressed. 
Mouth of moderate size, oblique. Lower jaw the longest, with a 
hook at its extremity, which is received into a corresponding emar- 
gination in the intermaxillaries. When the month is closed, the 
upper surface of the lower lip forms a portion of the superior profile 
of the head. Lips thin, covering both jaws. Preeorbital triangular ; 
apex below. Nostrils close to the anterior superior angle of the 
orbit; the posterior broad and patent, divided by a valve from the 
anterior, the margins of which are raised. Operculum nearly tri- 
angular, smooth. Intermaxillaries slightly protrusible, elevated into 
a point behind, expanded in front, and in central line emarginate to 
receive the hook of lower jaw. 
Fins. Dorsal arises rather nearer the caudal than it does to the 
snout, is slightly behind the commencement of the ventral, but does 
not extend so far backwards as to above the anal. Anal situated in 
posterior third of the body, arises at an equal distance between orbit 
and end of inferior lobe of caudal. Dorsal and anal square. Caudal 
deeply lobed. 
Scales on chest very small as far as ventral fins. Lateral line 
formed of long single tubes, only extending along fifteen scales, and 
curved downwards. 
Pharyngeal teeth short, wide, transversely oval; extremities con- 
cave both from side to side and from before backwards, in fact re- 
sembling the concave surface of a spoon, 3, 2, 1/1, 2, 3. 
Colours. Greenish above, silvery below. A bright greenish-yel- 
low line separates the green of the back from the silvery sides and 
abdomen. Summit of head bright green. Inside of mouth and lips 
closely spotted with black. Fins colourless. Eyes white. 
Is not uncommon in rivers and ponds. I have named the species 
after Dr. Jerdon, who appears to be the first who discovered the 
genus in India. 
BarRiLivs BAKER, Day, sp. nov. 
mea BD, 3/YOSP P15, Vs 10.9 Avo. Cxly.dn eas. E. 
tr. 9/2. 
Length of specimens from 4,5; to 5,4; inches. 
Length of head 7, of base of dorsal +, of base of anal +, of pec- 
toral 5, of caudal 3 of the total length. Height of head 4, of body 2, 
of dorsal }, of anal + of total length. Diameter of eye about 2 of 
Proc. Zoot. Soc.—1865, No. XX. 
