DISTRIBUTION AND 



ORIGIN OF LIFE IN 



AMERICA 



BY 



ROBERT FRANCIS SCHARFF 



Ph.D., B.Sc. 



Author of "European Animals, their Geological History and Geographical Distribution. 



Corresponding Member of the Academy of Natural Sciences, Philadelphia; 



of the Senckeriberg Natural History Society, Frankfurt a] Main ; 



of the Linnean Society of Bordeaux ; and of the 



Anthropological Society of Paris 



NEW YORK 



THE MACMILLAN COMPANY 



1912 



