r 



INITIATIVE IN 

 EVOLUTION 



BY 



WALTER KIDD, M.D., F.R.S.E. 



AUTHOR OF "USE— INHERITANCE," "DIRECTION OF HAIR IN ANIMALS AND MAN," 

 " THE SENSE OF TOUCH IN MAMMALS AND BIRDS," ETC. 



WITH NUMEROUS ILLUSTRATIONS 



H. F. & G. WITHERBY 



326 HIGH HOLBORN, LONDON 

 1920 



