Dr. N. SevertzofF on the Mammals of Turkestan. 325 



XXIX. — The Mammals of Turkestan. 

 By Dr. N. Severtzoff. 



[Continued from p. 225.] 



Ovis JTeinsu, nob. 



I have thus named this species, the first specimen having 

 been sent to me by General Heins from Tockmack: 



All the three surfaces of the horns are equally concave ; 

 the edges, although slightly rounded, are sharp. In the section 

 at the base of the horn the nuchal surface is a little narrower 

 than the orbital surface, and the frontal surface is about once 

 and a half as broad as either of the two former. 



The spiral of the horn fits on an inserted cone pointing to 

 the outside ; the axis of this cone points backwards with a 

 slight inclination downwards. 



The basal chord and the axis of the skull form an angle of 

 40°, the basal chord and the median form an angle of 31° ; 

 whilst the latter and the terminal chord meet in a right angle, 

 which, however, I believe, is less in very old specimens. 



The occipital ridge of the skull is rather elevated. The nasal 

 and orbital processes of the frontals are at first united in one 

 broad bone, which reaches down to the anterior rim of the 

 orbit, where the processes separate, the orbital, which is not 

 much smaller than the nasal process, extending over the ante- 

 rior parts of the orbit. 



The nasals are not widened superiorly ; their lateral edges 

 are not straight, but rather wavy; the sharpened points extend 

 over half the bone, so that the nostrils are very large, almost 

 two thirds of the whole distance from the anterior rim of the 

 orbit to the free extremities of the pramaxillse. The profile is 

 convex. 



The lachrymals form only the anterior corner of the orbit ; 

 of the Wormerian bones the upper one fits into the space 

 between the nasal and orbital processes of the frontal ; the 

 middle border is the shortest and the only one bent towards 

 the interior of the orbit, forming a very sharp angle at its 

 point. 



In the form of the lachrymal 0. Heinsii is nearer to 0. 

 Karelini than any other species of this genus. 



The malar forms almost the entire lower and anterior edge 

 of the orbit; its facial portion extends further towards the 

 muzzle than the lachrymal, from which latter it is partly 

 separated by a process of the maxillary ; the end of the facial 

 portion forms three rounded processes, of which the middle one 

 is the largest, the others being rather short. The maxillaries 

 Ann. d: Mag. N. Hist. Ser. 4. Vol xviii. 22 



