LOUIS CLARK VANUXEM FOUNDATION 



A CRITIQUE 



OP THE 



THEORY OF EVOLUTION 



BY 



THOMAS HUNT MORGAN 



PKOSESSOR OF EXPEBIMENTAI. ZOOI.OGT IN 

 COLUMBIA UNIVERBITT 



LECTURES DELIVERED AT PRINCETON UNIVERSITY 

 FEBRUARY 24, MARCH 1, 8, 15, 1916 



PRINCETON UNIVERSITY PRESS 



PRINCETON 



LONDON: HUMPHREY MILFORD 



OXFORD UNIVERSITY PRESS 



1916 



