72 



Records of the Indian Museum. [Voi,. XXIV, 



stream flowing into Rham-tso (Eastern Tibet). There are two 

 young specimens from Se-Chen in Tibet, which I also refer to this 

 species. 



Genus Adiposia, Annandale & Hora. 



1920. Adiposia, Annandale and Horn, Rec. Ind. Mus. XVIII, p. 182. 



The genus was recently proposed by Annandale and myself 

 for two species of Cobitid fishes from Seistan with a long soft 

 dorsal fin between the bases of the dorsal and the caudal fins. 

 We also referred a species from Turkestan, Adiposia longicauda 

 (Kessler) ,' to this new genus. 



Genus Nemachilus v. Hass. 



The thirteen species of the genus Nemachilus from Central 

 Asia in the collection differ from the numerous forms known 

 from the Indian Empire in their large size and almost subcylindri- 

 cal form. None of them, moreover, possesses the vertical bands 

 of pigment which characterize those from lower altitudes. 



The following is an artificial key to the Central Asiatic 

 species of Nemachilus in the collection of the Indian Museum : — 



I. Ventrals terminating a considerable distance in front of anal 

 opening. 



A. Kyes wholly in anterior half of head, dorsal commenc- 

 ing in advance of ventrals. 



B. Eyes in middle of head ; ventrals commencing in advance 

 of dorsal 



I I. Ventrals just reaching or extending beyond anal opening. 



A. Anterior origin of dorsal almost equidistant between tip 

 of snout and base of caudal. 



1. Lateral line incomplete, ending shortly after its com- 

 mencement 



2. Lateral line complete or becoming somewhat obscure 

 behind anal fin. 



a. Lye almost in middle of head, 

 i. Pectorals as long as head ... 

 ii. Pectorals shorter than head. 



a. Least height of caudal peduncle almost equal 



to diameter of eye 

 B. Least height of caudal peduncle considerably 



greater than diameter of eye. 



b. Snout longer than postorbital part of head 



B. Anterior origin of dorsal not equidistant between tip of 

 snout and base of caudal. 



1. Anterior origin of dorsal nearer tip of snout than base 

 of caudal 



2. Anterior origin of dorsal nearer base of caudal than tip 

 of snout. 

 a. Eye in middle of head. 



. Ventrals distinctly extending beyond anal opening. 

 u. Least height of caudal peduncle 4 times in its 



length, lower lip almost continuous ... 

 /3. Least height of caudal peduncle 5 times in its 

 length, lower lip widely interrupted 

 ii. Ventrals just reaching anal opening ... 



N . yavkandensis. 

 N . gracilis. 



N. v it tat us. 



N. yasinensisS . 



N. lliasae. 



N. kashmirensis. 

 N. tenuis. 



N. ladacensis. 



N. stoliczkae. 



N, tenuicauda. 

 N. mar mo rat us. 



1 Kessler "Pisces" in Ledtschenko's " Reise in Turkestan,'' p. 38, pi. vi, 

 ligs. 22, 23(1874). 



