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VOLUME XLIII 

 1911. 



EDITED BY 



DR. E: M. WALKER, 



Biological Department, 

 UNIVERSITY OF TORONTO, TORONTO. 



Editor Emeritus: REV. C. J. S. BETHUNE. 



ONTARIO AGRICULTURAL COLLEGE, GUELPH, ONT. 



, ILonlDon, ©nlarto : 

 The London Printing- and Lithographing Company, Limited. 



i9n. 



