THE 



EVOLUTION THEORY 



BY 



Dr. august WEISMANN 



PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF FREIBURG IN BREISGAU 



TRANSLATED WITH THE AUTHOR'S CO-OPERATION 



BY 



J. ARTHUR THOMSON 



REGIUS rilOFESSOll OF NATURAL HISTORY IN THE UNIVERSITY OF AUERDEEX 



AND 



MARGARET R. THOMSON 



ILLUSTRATED 



IN TWO VOLUMES 

 VOL. II 



LONDON 

 EDAVARD ARNOLD 



41 cV' 43 MADDOX STREET, BOND STREET, W. 



1904 



All righh- re.se)'i:ed 



