222 Dr. N. SevertzofF on the Mammals of Turkestan. 



The edges of tlie nasals are almost parallel at their base, 

 and only at their free extremities form a sharp angle j the nose 

 is convex. 



The lachrymals are more developed than in any other 

 species of sheep ; they occupy all the front part of the orbit, 

 filling up the front and bottom of it, and articulating with the 

 anterior process of the malar. There are three Wormerian 

 bones ; the upper one joins the occipital process of the frontal 

 bone (if there is one) ; all these three bones are turned towards 

 the interior of the orbit, in which they form a wide irregular 

 polygon with a serrated suture. The uppermost is the nar- 

 rowest, but alters much in width and usually ends in a sharp 

 point ; the middle one fits into the maxillary by two points, 

 and one is attached to the lower jawbone ; the lachrymal 

 itself is in the middle flat bone. 



The malar varies in its size ; but its facial portion is always 

 large, sometimes, however, only half the width of the lachrymal; 

 and, reckoning from the orbit, it is a little shorter ; its front 

 edge is toothed and has two or three processes ; these, however, 

 are usually very short. The malar itself is thick. The maxil- 

 lary is separated in old specimens completely, and in young 

 only partly, from the nasals. This species differs from 0. 

 Karelini in the alterations of the skull according to age, as 

 well as by the development of the frontals, also by the fact 

 that whilst the head grows higher the lachrymals do not grow 

 in width, but only in length. 



The different parts of the skull ankylose simultaneously ; 

 and, as already mentioned, this process takes place very 

 early ; and in connexion witli this it may be noticed that 

 the alterations of the skull according to age take place only up 

 to the time when the animal becomes adult, after which period 

 only the horns continue to grow and the forehead becomes 

 rather more convex, although this latter is hardly percep- 

 tible. 



The mane of adult specimens covers the same parts as it 

 does in 0. Karelini ^ viz. the throat, the sides of the neck, 

 and the front of the shoulders ; it is, however, much longer, 

 the hair being from 6 to 7 inches long ; on the spine it is from 

 3 to 4 inches in length, and gets sliorter as it approaches the 

 nape. The distribution of the white and the dark colour is on 

 the whole the same as in 0. Karelini ; but the colour of the 

 head is more blackish brown, and all other light-brown parts 

 of 0. Karelini are darker in the present species (namely, of a 

 greyish brown colour shaded with red) ; the sides are darker 

 and more grey than the back, intermixed with some white hair; 

 the upper front portion of the shoulders close to the mane is 



