SOME ANIMALS OF YUKON TERRITORY 307 



tween the two ranges, probably in the water-shed between 

 the Stewart and Peel Rivers. Owing to wide valleys and 

 other features of topography, the travel back and forth is 

 probably not extensive. The Ogilvies, however, are con- 

 tinuous uninterrupted ranges like the Pelly Mountains, 

 and toward the north the color of the sheep rapidly 

 becomes white. At the head of Coal Creek the grayish 

 pattern is faint and many of the sheep are pure white 

 with black tails. The darkest sheep of the region are 

 intermediate between jannini and dalli. The exact point 

 north where none of the sheep show traces of gray is not 

 determined, but it cannot be far, and we know that all 

 sheep north and west of the Porcupine River are white. 



The sheep west of Eagle and in the Tanana Hills, 

 between the Yukon and Tanana Rivers, are mostly pure 

 white, though some have enough dark hairs to suggest a 

 pattern area. In the same region, along the ranges west 

 of longitude 146 degrees, all the sheep are pure white. 

 It is not known whether sheep from the Selwyn River 

 have ever travelled northward to this region, or whether 

 sheep from the Ogilvies have crossed the Yukon River. 

 There are places below Eagle where sheep have been seen 

 on the ridges bordering the Yukon River. 



Now follows a most interesting and significant fact. 

 That portion of the Mackenzie Rockies, extending parallel 

 with the Mackenzie River water-shed, is an uninterrupted 

 series of continuous ranges as far as the head of the Peel 

 River. Sheep are abundant in all this area, including the 

 Nahanni Mountains in the south, not only to the Peel 

 River, but also continuously to the mountains west of the 



