790 MR. F. DAY ON THE FISHES OF tfARKAND. [Dec. 5, 



tremity, and not serrated. Pectoral two fifths as long as the head. 

 Ventral arises below the anterior dorsal rays. Caudal forked. 

 Scales : are scarcely imbricated, but cover the entire body ; those 

 forming the tiled sheath along the base of the anal fin are two 

 thirds of the diameter of the eye. Colours: silvery superiorly, 

 becoming dull white beneath ; a few blackish spots along the 

 back. 



This interesting skin has unfortunately had its anal fin removed, 

 whilst the pharyngeal teeth have not been preserved. The specimen 

 is 52 inches in length. 



It may be considered that as this fish differs from P. conirostris 

 in the form of its mouth and snout, also in the position of the 

 ventral fin, it might form a new genus ; but we have yet much to 

 learn of the mountain Barbels ; perhaps a more extensive ac- 

 quaintance will decrease the genera into which they are at present 

 subdivided. 



Hab. Kashgar (4043 feet elevation), the river from which place 

 eventually joins the Tarkand river. 



11. Ptychobarbus longiceps, sp. nov. 



B. iv., D. f, P. 1 9, V. 1 2, A. | C. 20, L. 1. 1 1 2, L. tr. 3 1 . 



Length of head 3f to 4, of caudal 7 to 7\, height of body 51 to 6 

 in the total length. Eyes : diameter 7 to 9 in the length of head, 1^ 

 diameter from the end of snout, and 2 apart. Mouth anterior, cleft 

 oblique, commencing superiorly opposite the upper margin of the 

 eye. Lower jaw somewhat the longer ; the maxilla reaches to below 

 the middle of the eye. The greatest width of the head rather ex- 

 ceeds its height, and equals half its length. Interorbital space flat. 

 No lower labial fold under the mandibles. Barbels : a maxillary 

 pair half as long as the eye. Fins : the dorsal commences midway 

 between the hind edge of the preopercle and the base of the caudal 

 fin. Its last undivided ray is osseous, of moderate strength, and 

 very finely serrated posteriorly ; its osseous portion equals a little 

 above one fourth of the length of the head. Pectoral half as long 

 as the head, and reaches halfway to the ventral ; the latter fin com- 

 mences under the first divided dorsal ray, and does not extend quite 

 halfway to the root of the anal. Anal twice as high as its base is 

 long ; it does not reach the caudal when laid flat ; the latter fin 

 forked. Scales oval, nearly as wide as high and slightly imbricate ; 

 the tiled row half the diameter of the eye. Free portion of the tail 

 rather longer than high. Colours : bluish on the back, lightest 

 below, dorsal and caudal spotted. 



Hab. Yarkand, whence the stuffed specimen described was 

 brought. It is 31 inches in length. This species scarcely accords 

 with the definition of Ptychobarbus, the last undivided dorsal ray 

 being osseous and finely serrated ; but the specimen is large, whilst 

 P. laticeps forms the intermediate form between it and P. coni- 

 rostris. 



