VOL. VII, PP. 1-64 APRIL, 1892 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON. 



THE GEOGRAPHIC DISTRIBUTION OF LIFE IN 



NORTH AMERICA 

 WITH SPECIAL REFERENCE TO THE MAMMALIA .* 



BY C. HART MERRIAM, M. D. 



CONTENTS. 



Page . 



Introductory Remarks 2 



Historical Synopsis of Faunal and Floral Divisions proposed for North 



America , 6 



Arctic Division (above limit of trees) 8 



Boreal Division 9 



Atlantic, Central, and Pacific Divisions of Temperate North 



America 10 



Atlantic or Eastern Forest Division 11 



Com ral or Middle Division 12 



Pacific or Californian Division 13 



Austroriparian or Louisianian Division 14 



Soiioran Division 15 



Peninsula of Lower California 16 



Southern Florida 17 



Antillean Division 18 



Northwest Coast Division 20 



Prairie Division 20 



Recapitulation 21 



Life Regions and Zones of North America (as here recognized) 21 



* Animal Presidential Address, delivered at the Twelfth Anniversary 

 Meeting of the P>i<>l<>gieal Society of Washington, February f>, 1<S!>2. 



I Bio,.. Boc.J WASH.. VOL. VII, isii-j. (1) 



