North American Fauna No. 55, U. S. Dept. of Agriculture, Biological Survey 



PLATE 21 



B4605M; B4604M 



A, Rocky Mountain mule deer buck in early winter coat, in Yellowstone Park (photographed by M. P. 

 Skinner); B, black-tailed deer from western Oregon (photographed by Wm. Everett, courtesy of the 

 Forest Service). 



