214 UNGOULALES. 
characteristic of these species is to be found in their horns, which, while very large 
and massive, are distinguished by the slight development of the wrinkles on their 
anterior surface, and the great prominence of the outer anterior angle, and the 
rounding-off of the inner one. In the skull the depression for the gland below the 
eye is extremely shallow ; and both in this respect and in the smoothness of their 
horns, these species show an approximation to the goats. 
American The American wild sheep is a large animal, with the summer 
Wild Sheep. coat of a light brown colour, often showing a reddish tinge, while in 
winter it is bluish grey on the upper-parts. The under-parts, as well as portions 
of the legs, are white; and there is a large and conspicuous white patch on the 
rump, which extends upwards on either side of the tail. The back has a more or 
less distinct dark stripe, reaching to the tail; the latter being very short, and 

SKULL OF KAMSCHATKAN WILD SHEEP. (From Guillemard’s Cruise of the Marchesa.) 
black in colour. The end of the muzzle is light-coloured. Beneath the hair there 
is a shining white under-wool. Very old males may become very light coloured 
throughout. The rams attain a height of about 34 feet at the withers; and their 
average weight is about 350 Ibs., or rather less. The ewes stand about 3 feet in 
height, and weigh about a third less than the rams. The length of horns in good 
Specimens, measured along the curve, varies from 33 to 36, or even 40 and 41 
inches; the broken tips frequently rendering them shorter than they would be, if 
perfect. A horn measuring 33 inches in length had a basal girth of 16 inches; 
while in one belonging to Mr. Otho Shaw, of which the length is 40 inches, the 
basal girth is only 154 inches. 
According to Mr. G. O. Shields, the geographical range of the 
American wild sheep extends from Mexico to Alaska, and from the 
eastern flanks of the Rocky Mountains to the Pacific coast; although there are 
some mountain ranges within this area upon which it has never been observed. 
Along the valleys of the Missouri and Yellowstone Rivers it extends, however, some 
Distribution. 
1 We are indebted to Dr. Guillemard and Mr. Murray for this figure, and also for the one of the head of the 
same species, 
