Dr. N. Severtzoff on the Mammals of Turkestan, 327 



The spiral of the horn would fit on an inserted cone with 

 the base pointing towards the skull ; the axis of this cone 

 points a little forwards, with a slight inclination downwards. 



The ridges on the horns are very sharp, but straight, regu- 

 lar and parallel with each other ; the horns do not extend 

 much down the forehead. 



The occipital ridge of the skull of an adult male is sharp 

 and very little rounded ; the forehead rises very steeply, 

 beginning from the nasals ; the first orbital process is narrow 

 and fits in between the two flats of the lachrymal ; the nasal 

 process is very long. 



The nasals are not so wide where they join the frontals as 

 they are towards their lower extremities ; their sharpened point 

 is short. 



The nostrils are very small, smaller even than those of 0, 

 Karelind'^ and viewed in profile the nostrils extend less than 

 half the distance from the lachrymal to the end of the pra3- 

 maxillse. The profile of the nose is almost straight, and 

 becomes a little convex only near its end : with advanced 

 aget his prominence of the nose increases ; but even in old spe- 

 cimens of O. nigrimontana it is not so considerable as it is in 

 young specimens of other species. The flats of the lachrymal 

 are situated along the front edge of the orbit, so that the 

 lowest extends further forward than the upper one. The 

 latter does not reach as far as the centre of the orbit; the 

 middle one is wide and extends to the centre of the orbit. 



The malar extends along the whole lower margin of the 

 orbit ; it is wide ; its facial portion is about the same width 

 as the lachrymal ; its anterior border is straight, joining the 

 inferior border at a sharp angle. The zygomatic process 

 of the malar is long and thin, being in its whole length of 

 equal width. 



The maxillary is separated by a long narrow bone from the 

 nasal, which does not join the lachrymal as is the case with 

 the other sheep, but is connected with the nasal process of the 

 frontal. 



The variations of the skull according to age are unknown ; 

 all the three skulls obtained by me belong to specimens of 

 over six years of age, with all the cranial bones ankylosed. 



I gave above a description of the colour as far as I could 

 distinguish it. 



This species inhabits almost the entire Karatau; it is 

 abundant on the summits of the Buguni, on the rocks near 

 Marnin-saz, and on the western portion of the Teramsk hills, 

 where the numerous steep rocks and ravines near the river 

 Borolday affbrd good hiding-places to these animals. They 



22* 



