236 EXPLORATIONS IN THE FAR NORTH 



Mackenzie north of the Great Bear Lake to Sabine Island 

 (74°45' N.) on the east coast of Greenland, and from 6o°N. in 

 the Barren Ground west of Hudson's Bay through the North- 

 ern Islands as far as man has penetrated. 

 Five specimens killed near Bathurst Inlet. 



Ovis montana Cuv. Mountain Sheep. 



I attempted to secure specimens of big horn in southwestern 

 Alberta in April, 1893, 1 but was unsuccessful. I afterward 

 learned that the Stoneys use dogs in hunting them at that sea- 

 son. Two specimens, a skull, and a head bearing horns 14^ 

 inches in circumference and 32 inches long, weighing, without 

 the lower jaw, 24 pounds. 



Ovis montana dalli (Nc/s.). 2 Alaska Mountain Sheep. 3 



The specimen of this rare animal, secured by Mr. Russell 

 through the kindness of Capt. F. C. Murray, of Herschel Island, 

 is an adult male in good condition. The pelage is coarse, like 

 that of the common mountain sheep, but very thick and heavy, 

 the individual hairs being 5-6 inches long. The color is white 

 throughout, with a yellowish wash on the forehead and in front 

 of the tarsi. 



The most conspicuous anatomical difference between this 

 form and C. montana is in the shape of the horns, which are 

 much more spreading in the former, one specimen showing a 

 spread of 2 ft. 5 in. between the tips, and another 1 ft. 8 in. 

 The common form shows a spread of only 1 ft. 5 in. and 1 ft. 

 in the two specimens before me. The arctic specimens have 

 much larger and more distinctly separated corrugations on the 

 basal half of the horn than are found in the specimens of the 

 southern form with which they were compared. The distal 

 portion of the former is more conspicuously flattened than in 

 the latter, and the proximal portion more distinctly triangular 

 in cross-section. There is also a notable difference in the rela- 

 tive size of the hoofs. 



The following measurements of mounted specimens will show 



1 See p. 47, ante. 



8 Proceedings U. S. Nafl Mas., Vol. VII, p. 12. 



3 These specimens having been received during the absence of the author, 

 this description is contributed by the curator of the museum. 



