1876.] MR. F. DAY ON THE FISHES OF YARKAND. 797 



mens the lower edge of the preorbital is free. Lips thickened and 

 fimbriated in the adult ; lower labial fold interrupted in the middle, 

 and rather lobed on either side. Barbels six ; the outer rostral pair 

 extend to below the hind edge of the eye, the maxillary ones to the 

 opercle in the adult. Fins : dorsal commences midway between the 

 end of the snout and the base of the caudal fin ; its upper edge is 

 slightly concave, with a rounded upper angle ; it is rather more than 

 one half higher than the extent of its base or than the body below 

 it. Pectoral nearly as long as the head, and reaches rather above 

 halfway to the ventral, which latter commences under the third 

 dorsal ray ; is as long as the pectoral, and reaches the base of the 

 anal. Anal twice as high as wide at its base. Caudal slightly emar- 

 ginate. Free portion of the tail one third as high at its base as it is 

 long, whilst its breadth equals its height. Scales absent. Air- 

 vessel in two portions, enclosed in bone. Colours : yellowish white, 

 its upper surface and sides sometimes with dark blotches and spots; 

 dorsal and caudal with dull spots. 



This fish is allied to N. ladacensis, Giinther, but is distinguished 

 by a more elongated body and longer barbels &c. 



Hub. Aktash (12,u'00 feet elevation), where the waters of the 

 Ak-su pass to the Oxus ; and Yankihissar (4320 feet elevation), 

 where the rivers go to the Yarkand river. 



18. Nemaciieilxjs ladacensis. 



Nemaeheilus ladacensis, Giinther, Cat. vii. p. 356. 



B. iv., D. I P. 13, V. 9, A. % C. 19. 



Length of head 5, of caudal 5J, height of body 5| in the total 

 length. Eyes: diameter 5 to o| in the length of head, 2k diameters 

 from end of snout, and 2 apart. Greatest width of head equals its 

 height or its length excluding the snout. Lips moderately thick and 

 rugose ; lower labial fold interrupted in the middle. Barbels six ; 

 the maxillary ones scarcely reach to below the front edge of the eye, 

 the longest rostral ones to b;4ow the front nostril. Fins : dorsal 

 commences midway between the front edge of the eye and the base 

 of the caudal fin ; it is as high as the body below it and half higher 

 than its base is long ; its upper anterior corner rounded. Pectoral 

 as long as the head behind the angle of the mouth, and reaching 

 nearly to the ventral, which latter fin arises below the commence- 

 ment of the dorsal fin ; it is shorter than the pectoral, but extends 

 to the base of the anal. Anal twice as high as long, and reaches 

 above halfway to the base of the caudal, which is emarginate. Free 

 portion of the tail twice as long as high at its base. Scales absent. 

 Colours : of a light fawn, with sixteen or eighteen interrupted darker 

 and sinuous bands passing from the back down the sides ; a siivery 

 lateral band. Dorsal and caudal finely spotted in lines ; a darkish 

 band on pectoral, ventral, and anal. 



Hab. Gnari Khorsum, Tibet. The specimen described is the 

 largest of two obtained by Messrs. v. Schlaginweit, and deposited in 

 the Indian Museum. The size of the British- Museum specimen, and 



