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Show 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, aud 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 emarginate. 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, Gunther, but is distinguished by a more elongated body and longer barbels &c. Hab. Aktash (12,600 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. NEMACHEILUS LADACENSIS. Nemacheilus ladacensis, Gunther, Cat. vii. p. 356. B.iv., V.\, P. 13, V. 9, A. J C. 19. Length of head 5, of caudal 5f, height of body 5g in the total length. Eyes: diameter 5 to 5| in the length of head, 2\ 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 below 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 rnouth, and reaching nearly to the ventral, which latter fin arises below the commencement 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 silvery 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 |