Introduction 



19 



The Divisions on the Map opposite may be set forth thus: 



Arctic Region divided into: 



Faunas 



Greenland 



Alaskan 



Barrenground 



Alpine 



Aleutian 



Temperate Region divided into: 



Faunas 



Subalpine subfauna 

 Yukon 

 Hudsonian ( Hudsonian 

 Labrador 

 Newfoundland subfauna 



Canadian 



SiTKAN 



Pacific Coast 

 Campestrian 



^Canadian subfauna 

 I Rocky Mt. subfauna 



Saskatchewan or True Campestrian 



subfauna 

 Okanacan subfauna 



Alleghanian [Western or Prairie Alleghanian subf. 

 '^r.astern or Woodland subfauna 



Boreal 

 Zone 



Transition 



Carolinian (with Upper Sonoran)=Upper Austral 



T ^TT,o..»,x.., /The Gulf-strip and the \ Lower 

 Louisianian -r o 1 = A I 



*■ Lower bonoran together > Austral 



Austral 

 Zone 



Tropical Region: 



Shown here in broad outline only 



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