THE 



WONDERS OF LIFE 



A POPULAR STUDY 

 OF BIOLOGICAL PHILOSOPHY 



BY 



ERNST HAECKEL 



(Ph.D., M.D., LL.D., Sc.D., and Professor at the 

 University of Jena) 



AUTHOR OF 



••THE RIDDLE OF THE UNIVERSE" 



"THE HISTORY OF CREATION" 



" THE EVOLUTION OF MAN " 



ETC. 



TRANSLATED BY 

 JOSEPH McCABE 



SUPPLEMENTARY VOLUME TO 

 "THE RIDDLE OF THE UNIVERSE" 



«^ 



\^o'^ 



HARPER & BROTHERS PUBLISHERS 

 NEW YORK AND LONDON 



