1920.) N. ANNANDALE & S. L. Hora: The Fish of Seistan. v 
9 79 
1916. Nemachilus stolicskae, Vinciguerra, Ann. Mus. Stor. Nat. 
Genova, XLVII, p. 146. 
1916. Nemachilus stenurus, id., op. cit., p. 148. 
The Indian Museum possesses a large number of specimens of 
this species from Tibet, northern Kashmir, Turkestan and Seistan. 
Among those identified by various ichthyologists as N. stoliczkae 
we find, however, four forms, one of which is without doubt speci- 
ficaliy distinct. This is N. dhasae, Regan, from Tibet; we give 
measurements of a series of specimens but need not discuss the 
species further. The remaining three forms that have hitherto been 
placed together under the name Nemachilus stoliczkae in India 
belong in our opinion to that species and are identical respectively 
with the typical form (of which we have a topotype), the variety 
leptosoma of Herzenstein and N. stenurus of the same author. All 
Text-FiG. $.—Alimentary canal of Nemachilus stoliczkae from Seistan. 
A. From specimens of stoliczkae type. 
B. From specimens of stenurus type 
a and 6 =cut ends of alimentary canal, 
the specimens from Seistan were identified by Mr. Tate Regan as 
N. stenurus, but we find among them two distinct forms, one of 
which we regard as identical with /eptosoma, while the other we 
retain under the name sfenurus, which, however, we do not accept 
as specific. 
The first specimens we examined were those from Seistan 
labelled N. stenurus. ‘The existence of two forms among them 
was visible on inspection and was on the whole confirmed by 
measurements. ‘There were seven specimens in this series, as to 
four of which we had no hesitation in accepting Mr. Regan’s 
identification. Of the remaining three specimens, one was an 
adult female, one a breeding male and one very young. The male 
agrees well with Herzenstein’s figures of N. stoliczkae var. lepto- 
soma, the female rather with that of var. froductus. As the main 
difference between these two supposed varieties and sfenurus lies 
