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



PLATE 42 





, t 



B4621M: B4620M 



A, Arizona weasel in Yellowstone Park (photograph by C. O. Schneider, July 12, 1924); B, Rocky 

 Mountain marten in full winter fur, Glacier National Park, Mont, (courtesy of Ranger James Brooks). 



