VOL XIV, BO. 539 



NOVEMBER, 1911 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! with 

 Special Reference to the Factors of Evolution 



CONTENTS 



Some Experimental Observations concerning tne Benavior of Various B« 

 In tnelr Visits to Cotton Blossoms. H. A. Allard - 

 . Tne Distribution of Pure Line Means. Dr. J. Arthur Harris - - 

 rstem of recording Mendelian Obsen 



THE SCIENCE PRESS 



LANCASTER, FA. 



GARRISON, H. 



NEW YORK: STTB-STATION 84 



