784 MR. F. DAY ON THE FISHES OF YARKAND. [Dec. 5, 



while drawing attention to the same fact as occurring in specimens 

 of this genus. Thus, in examining the following ten examples of 

 O. richardsonii, Gray, in the British Museum, I found them as 

 follows : — 



4 specimens, in spirit, from 3*3 to 38 inches in length. Head 



from 4 to 4 1 in the total. 

 1 specimen, in spirit, 4 inches in length. Head 4^ in the total. 



2 



H 



5 



Of the Schizothora.v, or more essentially mountain-Barbels, there 

 are several species. 



2. SCHIZOTHORAX CH RYSOCHLORUS. 



Bacoma chrijsochlora, M'Clell. Cal. J. N. Hist. ii. p. 577. t. xv. f. 3. 



Schizothorax biddulphi, Giinther, Ann. & Mag. Nat. Hist. 187(3, 

 xvii. p. 400. 



B. iv., D. ^, P. 18, V. 10, A. % C. 20, L. 1. 1 10 to 120. 



Length of head 4f to 5^, of caudal 6 to 6^, height of body 6g in 

 the total length. Eyes: diameter 5g (in a fish 7 inches long), 7 to 

 9 in the length of head, 2 to 2g diameters from the end of snout, and 

 the same apart. Upper surface of the head nearly flat ; its width 

 rather exceeds its height, and equals half its length. Snout rather 

 compressed, and overhanging the upper jaw. Mouth directed for- 

 wards, horseshoe-shaped, the lower labial fold interrupted in the 

 middle. The maxilla reaches to below the front nostril. The depth 

 of the cleft of the mouth equals the width of its gape. A very thin 

 horny covering to the inside of the lower jaw. Posterior edge of 

 opercle cut square. Barbels : the rostral ones as long as the eye, 

 the maxillary rather longer, sometimes twice as long, and reach to 

 beneath the middle or hind edge of the orbit. Teeth pharyngeal 

 5, 3, 2 . 2, 3, 5, pointed, and with rather compressed summits. Fins : 

 the dorsal, which is as high as the body, arises midway between the 

 end of the snout and the base of the caudal, its last undivided ray 

 osseous, strong, finely serrated posteriorly, from a little longer than 

 the head, in a specimen 119 inches in length, to 4 the length in the 

 adult. Pectoral as long as the head excluding the snout ; it reaches 

 halfway to the base of the anal. Anal, when laid flat, reaches about 

 halfway to the base of the caudal, which latter fin is forked. Scales : 

 the row which bears the lateral line consists of larger scales than 

 those above or below it ; those forming the anal sheath are equal to 

 half a diameter of the eye. Colours : greyish along the back, becoming 

 yellowish-white on the sides and beneath ; a black mark over the eye, 

 and a few dull spots on the back. 



Hab. Kashgar, Yankihissar, and Yarkand, up to 20 inches in 

 length. 



