North American Fauna. No. 27, U. S. Dept. Agr., Biological Survey. 



Plate li. 



Life Zones of Hudson Bay and Mackenzie Regions. 



! Canadian. ' i Hudsonian. Uncolored— Arctic. 



(An area of Transition covers part of the Saskatchewan Valley, but is not here shown.) 



THE SOKKIS PETERS CO., WASHINCTOH. D. C 



