1885.] 



DR. F. H. H. GUILLEMARD ON OVIS NIVICOI-A. 



^n 



white; this colour does not surround the tail. The ears are 

 remarkably short. 



Sir Victor and Mr. Basil Brooke, in their article on Asiatic Sheep 

 (P. Z. S. 1875, p. 509), remark on the resemblance of the horns of 

 this species to those of 0. montana, with which latter it has indeed, 

 by some naturalists, been regarded as identical. But, as will be seen 

 by the annexed illustrations, the uniforndy smaller size of the head, 

 the shortness and great breadth of the skull in its anterior aspect, 

 the slight development of the prseorbital fossae, and the protuberance 



Fi-. 2. 



Head of 0ms montana. 



of the orbit itself serve to distinguish markedly the Kamschatkan 

 Sheep from that of America. 



The horns are less rugose than those of 0. montana. The frontal 

 surface is convex ; the orbital surface at first concave, then flat, thus 

 causing the fronto-orbital edge to be very sharp. The nuchal 

 surface is convex and afterwards flattened ; and the two remaining 

 edges are rounded. 



The following are the measurements obtained from a series of 

 nine skulls : — 



Ovis nivicola. 



Length of skull 



Breadth between orbits 



Length of horns round \ 

 curve J 



Circumference of horns 1 

 at base J 



Horns from tip to tip . . 



in. 

 lOJ 



35 

 21 



in. 



m 



25 



4| 

 24 



13 



m 



32J 



14 

 21 



in. 

 lOf 



351 



14 

 26i 



38 

 26 



in. 

 lOj 



5i 

 321 



13| 

 22i 



in. 



104 



5i 

 26J 



12i 

 2\i 



'65 

 25i 



Ovis montana. 



in. 



11 



m. 

 13^ 



6 



43 



Proc. Zool. Soc— 1885, No. XLIV. 



44 



