'MATERIALS 



FOR THE 



STUDY OF VARIATION /, 



TREATED WITH ESPECIAL REGARD TO 



DISCONTINUITY 



IN THE 



ORIGIN OF SPECIES. 



BY 



WILLIAM tBATESON/ M.A. 



FELLOW OF ST JOHN'S COLLEGE, CAMBRIDGE 



'iLontion : • 



MACMILLAN AND CO. 



AND NEW YORK. 



1894 



[All Eights reserved.] 



