THE MAKING 

 OF SPECIES 



BY DOUGLAS DEWAR, B.A. (Cantab), I.C.S., F.Z.S. 

 AND FRANK FINN, B.A. (Oxon), F.Z.S., M.B.O.U. 

 WITH FIFTEEN ILLUSTRATIONS 3 ^ 



LONDON: JOHN LANE THE BODLEY HEAD 

 NEW YORK: JOHN LANE COMPANY MCMIX 



