VOL. XLV, NO. 829 



JANUARY. 1911 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! with 

 Special Reference to the Factors of Evolution 



CONTENTS 



Page 



IV. Rotes and Literature: Heredity, Dr. W. J. Spillman. 60 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. Y. 



NEW YORK : SUE-STATION 84 



