342 R. E. LiyOYD : Aquatic animals from Tibet. [Voi.. II, 



Schizothorax macropogon, Regan. (PI. xxv, fig. 4.) 



Three specimens measuring 26, 29 and 37 cms. They differ 

 slightly from the described type of the species, which was from 

 Lhasa. 



The length of the head is only ^ of the total length, and the 

 barbels are as long as the head excluding the snout. 



Schizopygopsis stoliczkce^ Steindachner. 



A very common fish in these waters (identified by Captain 

 Stewart). 



Schizopygopsis stoliczkce (colour variety). Specimens were 

 taken in which the pigment of the back was concentrated in stellate 

 spots : this peculiarity had no dependence on illumination, age, or 

 sex. 



Parexostoma stoliczkce (Day). 



Two specimens, measuring 250 and 190 mm. respectively, have 

 been referred to this species. The^/ agree very closely in their pro- 

 portions with certain of Day's specimens from Leh in Western Tibet. 

 They differ, however, somewhat in that their heads are relatively 

 larger and flatter. In colour they are olivaceous above, the pigment 

 being arranged in a speckled manner on a yellow ground ; below 

 they are dull yellow. 



P. maculatum, Regan, from lyhasa seems to resemble P. 

 stoliczkcB very closely, except in colour. In this respect, however, 

 our specimens from Gyantse appear to agree, judging from the 

 descriptions, with the specimens from Leh more closely than with 

 those from Lhasa. 



In the specimens from Gyantse, the head length is more than 

 i of the total length, the length of the snout is 1^ times the inter- 

 ocular distance as in P. maculatum and as in many of Day's type 

 specimens (of P. stoliczkcs) from Leh. 



In Day's description of this latter species, however, the length 

 of the snout is said to be twice the distance between the eyes. 



Schizopygopsis stewartii, n. sp. (PI. xxv, fig. i.) 



The length of the head bears to the length of the body (without 

 the caudal) the proportion of i : 4. The head is flattened above, 

 the snout being conical and pointed, the point of the lower jaw 

 and the snout reach to the same level. The diameter of the eye is 

 to the length of the head as i : 7 ; to the length of the snout as 

 I : 2. The length of the snout is slightly greater than the inter- 

 ocular distance. 



The dorsal fin contains three spines and seven rays, the third 

 ray is deeply serrated and is about as long as the postocular part of 

 the head. The first spine is situated nearer to the root of the tail 

 than to the end of the snout, the distances which separate these 



