1 54 Bulletin American Museum of Natural History. [Vol. XVI, 



its larger size, longer and heavier antlers, and in the large size 

 of the white rump patch. This patch, measured across the 

 base of the tail, has a breadth of 250 mm., but is divided 

 through the middle by the dark band, 50 mm. wide, that 



Fig. 3. Rangifer tnontanus, $ ad., No. 17971, Gold Range Mountains, B. C. 7 nat. size. 



passes down the tail, the white patch being thus separated 

 into two areas, each with a transverse width of 100 mm. 



The relationship of R. osborni to R. montanus is considered 

 below. 



In this connection it is due Mr. Madison Grant to state that 



