246 Records of the Indian Museum. [Vol. VIII, 



Dorsal II 7, first entire, second articulated, rest branched; 

 the origin of the dorsal is somewhat posterior to the vertical 

 from the anterior part of the root of the ventral, its distance 

 from the gill opening being twice the depth of the body. The 

 dorsal is equidistant between the tubular nostril and the root of 

 the caudal ; the longest ray is two-fifths the length of the head. 

 The positions of the pectoral and ventral are low ; the length of 

 the pectoral is nearly two-thirds of the distance between the roots 

 of the pectoral and ventral while the length of the ventral is 

 nearly half the distance between the roots of the ventral and anal. 

 The vent is placed far forward, being equidistant from the post- 

 orbital line and the root of the caudal, and twice as much nearer 

 the root of the ventral than the anal. Anal II 5, short. The free 

 portion of the caudal end of the body is one and two-thirds 

 as long as deep. The caudal fin is entire, longer than the length 

 of the head and with its free end highly convex. The air-bladder 

 is enclosed in a bony capsule open at the sides and covered with 

 membranous skin only. The intestinal canal has only one convo- 

 lution and a loop below the muscular stomach on its right-hand side. 



Colour. — The head is marbled with round black and grey 

 blotches and loops ; the sides of full-grown specimens are striped — 

 from the gill openings to above the anal fin — with dark brown trans- 

 verse stripes 18 to 21 in number, inclined away from the head, on 

 a yellowish white ground, the caudal peduncle being quite free 

 from these transverse stripes. The stripes are broader at the 

 top, become thinner gradually and disappear before reaching the 

 ventral surface ; in their broadest part they are only half as broad 

 as the interspaces; the posterior ones are short, the last being less 

 than half the depth of the body. The barbels, pectoral, ventral and 

 anal fins, together with the ventral side of the body, are dull 

 white ; the dorsal fin is banded with dark brown spots and there 

 is an irregular blotch at the upper corner of the root of the 

 caudal. The caudal fin is beautifully banded with two broad 

 black concentric curves, one about the middle which is somewhat 

 blurred and deep and the other intensely black almost bordering 

 the margin, but leaving a narrow white fringe. From the large 

 series of young ones it has become possible to study the develop- 

 mental changes in colouration and striping. In the young the 

 dorsal and caudal fins are immaculate, but broad stripes are 

 visible all over the sides of the body including the caudal peduncle. 

 With the progress of age dark spots appear on the dorsal and 

 caudal fins, and at the same time the broad transverse stripes on 

 the sides of the body gradually get thinner and entirely disap- 

 pear from the sides of the caudal peduncle. The dark spots on 

 the dorsal and caudal fins are gradually arranged in banded 

 series on the dorsal and into two beautiful broad concentric curves 

 on the caudal fin. 



Three full-grown specimens from Egar stream between 

 Renging and Rotung, collected by Mr. S. W. Kemp. Their regis- 

 tered numbers in the Museum register and their total lengths with 



