272 THE SHEEP AND ITS COUSINS 



least in winter, the white throat-ruff of the former, 

 but the tips of the horns of old rams turning up- 

 wards somewhat in the fashion of those of the 

 latter. The horns of an old ram belonging to 

 Mr. Haig Thomas, which came under my notice a 

 few years ago, closely resembled those of the type 

 specimen described and figured by Professor Peters, 

 who first named this race, and differ from those of 

 the Siberian argali by the absence of that marked 

 " nipping-in " of the descending portion below 

 the eyes, and thereby approximate to those of the 

 Tibetan argali. When viewed directly from the 

 front, there is, however, a distinct angulation at 

 the upper end of the space between the horn and 

 the skull, although this is less marked than in the 

 Siberian argali ; in the Tibetan race it is practically 

 absent. The right horn measured 41 J inches in 

 length and 17J inches in girth. 



In the head shown in plate xxi. fig. i, the above 

 features are not very apparent, owing to its being 

 viewed somewhat obliquely, instead of full face. 



The typical representative of the species is the 

 true Ovis ammon of the Altai, in which, when fully 

 developed, the horns of old rams (pi. xxi. fig. 2) 

 form more than one complete circle, so that their 

 tips extend much beyond the lateral margins, while 

 they are rounded in front, and closely approximated 

 to the sides of the face, so that when viewed directly 

 from in front the space between each horn and the 



