SCIENTIFIC RESULTS 
OF 
THE SECOND YARKAND MISSION. 
ICHTHYOLOGY. 
By FBANCIS DAY, B.L.S., B.Z.S. 
T HE following descriptions refer to the entire collection of fishes obtained during the 
expedition (except, so far as I know, two specimens 1 ). With them I have compared 
some types of Steindachner’s excellent paper on Dr. Stoliczka’s “Pishes of Tibet” (Yerh. z.-b. 
Ges. Wien, 1866), which specimens were given me by Dr. Stoliczka. 
Mr. Hume, O.B., has since then obtained a few more skins of fishes from those regions 
through the exertions of Dr. Scully. These have likewise been forwarded to me; and one 
appears to be a very aberrant form of j Ptychobarbus. 
Order PHYSOSTOMI. 
Family —SIL XJUIDJB 
1. Exostoma Stoliczkze. Plate I, fig. 1. 
Day, Proc. Zool. Soc. 1876, p. 78S. 
D. A, P. T V, Y. A, A. 6, C. 15. 
Length of head from 4 in the young 2 to 5J, of caudal 8, height of body in the total 
length. Eyes minute, situated in the middle of the length of the, head; the width of the 
interorbital space equals half that of the snout, or the distance between the eye and hind 
1 These two specimens are in the British Museum. 
3 The remarkable difference in the comparative length of the head to that of the total length is shown in the following 
figures:— 
3 specimens 4 inches in length. 
4 
33 
4'2 to 4‘5 
33 
5 
53 
5-0 to 5-7 
33 
3 
33 
6'0 to 6'6 
2 
33 
7 
33 
Head 4 to 4| in the total length. 
„ 4% to 5i „ 
„ 5 to 5| „ 
„ 5| to 5| „ 
„ to 5| „ 
