1885.] 



DR. F. H. H. GUILLEMARB ON OVIS NIVICOI.A. 



^11 



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. 187.5, 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 uniformly smaller size of the head, 

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

 the slight development of the praeorbital fossae, and the protuberance 



Fig. 2. 



Head of Ovis 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 : — 



Length of skull 



Breadtli between orbits 



Length of horns round "I 

 curve J 



Circumference of horns I 

 at base j 



Horns from tip to tip . . 



pROc. ZooL. Soc— 1885, No. XLIV. 



44 



