igii.] F. H. Stewart : Cyprinidae from Tibet. 87 



in the former being narrower, shorter and lower than in the latter. 

 The Chumbi valley race is intermediate in this proportion. Varia- 

 tion in this character is independent of variation in head form. 



The species inhabits an extensive but clearly defined area 

 extending from Badakshan and the Pamirs to the Eastern Hima- 

 laya and including the upper waters of the Oxus, Indus, Sutlej, 

 and Brahmaputra (Tsang-po). On the south face of the Hima- 

 laya it has hitherto been found in the Chumbi valley only. 



Its characteristic habitat is in the streams and small rivers 

 of the open, treeless, flat, grassy uplands at an elevation of 

 II — 16,000 feet : broad valleys in the centre of which a river runs 

 with moderate rapidity, while on either side are marshy pools fed 

 by springs, shallow ponds or irrigated land. 



It is a highly successful and very numerous species, closely 

 adapted to its surroundings. It breeds in June and possibly also 

 in May and July. Sexual maturity is not attained before the 

 fourth year. 



Table iv (p. 88) gives measurements of the individual fish in 

 groups P. 4, D. I, D. 2, K. i and Ch., in regard to the following 

 characters. Column 2 gives the registered number of the, speci- 

 men in the Indian Museum : — 



Col. 3, length of body in millimetres, 

 total length 



4, 

 5, 



7, 



maximum height of body. 



total leng th 



maximum breadth of head. 



total length 



ngth of heac 



total length 



^ total length 



length of head 



height of head. 

 (^ length of head 



diameter of eye. 



;, 9, relation of anterior margin of mouth-cleft 

 to the lower margin of orbit. 



II. The adult and young forms of Gymnocypris waddellii, 



Regan. 



Gymnocypris waddellii, Regan (6). 



Ind. Mus. Nos. F. ?«« , 2863 ^^^^ •2^u--im 

 11 1 ■ 



Two adults and six young were taken by Capt. Kennedy in 

 a stream flowing into the Rham Tso near Chain Bridge {vide pi 

 iii, fig- 5). 



The following description is taken from the two adults : — 

 Length 417, 440mm. D. ii. 7, 8. An. ii. 6. P. i. 21. V. i. 9. 



