THE 



EVOLUTION THEORY 



BY 



Dr. AUGUST ^EISMANN 



PROFESSOR OF ZOOLOGY IN THE UNIVERSITY OF FREIBURG IN BREISGAU 



TRANSLATED WITH THE AUTHOR'S CO-OPERATION 



- BY 



J. ARTHUR THOMSON 



REGIUS PROFESSOH OF NATURAL HISTORY IN THE UNIVERSITY OF ABERDEEN 



AND 



MARGARET R. THOMSON 



ILLUSTRATED 



IN TWO VOLUMES 

 VOL. I 



LONDON 

 EDWARD ARNOLD 



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



1904 



All rights reserved 



T 



