276 THE ZOOLOGIST. 
by the light of Dr. Severtsoff’s paper on the Mammals of Tur- 
kestan, translated in the ‘Annals of Natural History’ for 1876. 
Of three species of Marten as well as of a Lynx Dr. Lansdell 
was able to secure in Vernoe the skins and skeletons, all of which 
are now in the British Museum. 
At p. 245 of vol. i. he gives a figure (here reproduced) of that 
fine Central Asian Sheep, Ovis polii, named after its discoverer, 
Marco Polo. Round the neck there is a pure white mane, and 
the light greyish brown of the back and sides shades off into 
white towards the belly, the legs being brown. It inhabits high 
hilly plains and runs with great speed. Severtsoff gives its 
length as 6 ft. 9 in. from nose to tail; height at shoulder, 8 ft. 
THIAN-SHAN SHEEP. 
10 in.; length of horn, 4 ft. 9in.; distance between tips of horns, 
3 ft. 6 in.; and length of skull, 1 ft. 2 in. Col. Prejevalsky, who - 
shot some fine specimens on the Yuldus plateau, where he fell in 
with herds of thirty or forty, gives the measurements of the horns 
of the old males which he c’ ued as 4 ft. 8 in., with a thickness 
of 18 in. at the base. Its we.,at is enormous. Severtsoff shot an 
old ram that proved too heavy for a camel to carry. This camel 
took four hours to go three miles, and was obliged to lie down 
several times on the way. At low elevations a camel can carry 
600 tes. with ease, and on lofty plains where the air is rarefied 
