A CORRECTION CONCERNING THE 

 LIFE ZONES OF CANADA. 



A. BROOKER KLUGH. 

 QUEEN'S UNIVERSITY, KINGSTON, CANADA. 



A great step forward in the study of North American biota 

 was taken when Merriam ('94) divided the continent into life 

 zones and faunal areas on the basis of temperature. His divisions 

 were natural ones and have been widely adopted, though they 

 have been objected to by some botanists who have, however, 

 given us nothing better, or as good. Subsequently several faunal 

 maps of North America have appeared, founded mainly on that 

 of Merriam ('98), and in some of these, notably that of Seton 

 ('09), faunal areas not previously recognized are marked. 



All the faunal maps of North America that I have seen are 

 inaccurate in regard to one particular of w r hich I happen to have 

 special knowledge the border-line between the Transition and 

 Canadian Zones in Ontario. In Merriam's and Seton's maps 

 the top of the Bruce Peninsula is indicated as being in the 

 Canadian Zone, and the line between the Canadian and Tran- 

 sition is a little too low at the point where it touches Georgian 

 Bay. In the American Ornithological Union map (1910) not 

 only the whole of the Bruce Peninsula but a good deal of Central 

 Ontario is indicated as Canadian. 



The data which I here make use of in showing the true faunal 

 position of the Bruce Peninsula was obtained while engaged in 

 biological work on the peninsula in 1905, '07, '08, '09, '10, 'n, 

 '12 and '15, and that concerning the position of the boundary 

 between the two zones in the vicinity of Georgian Bay was 

 obtained on a motor-boat trip round the bay in 1912, when I 

 camped at various points on the shore, and at Lake of Bays, 

 Muskoka, in 1916. Work done in the vicinity of Ottawa in 1917 

 confirms the position of the line between the two zones as given 

 by Merriam and Seton. 



The Transition Zone, as its name implies, is a region of inter- 



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