VOL L, NO. 597 



SEPTEMBER. 1916 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOTTRNAL 

 Devoted to the Advancement of the Biological Sciences i 

 Special Reference to the Factor* of Evolution 



CONTENTS 



n. Inheritance Stndles in Piatun. Dr. Obland E. White - - - - 

 HI. The Results of Further Breeding Experiments witn Petunia. Edith R. 



Saunders - -- -- -- -- -- - 



IV. Inheritance of Sex in the Grape. W. D. Valleatj 



V. On Primarily Unadaptire Variants. John Treadwell Nichols - - 



VI. Shorter Articles and Discussion. Tables of Linkage Intensities. Professor 



THE SCIENCE PBESS 

 LANCASTER. PA. GARRISON, N. Y. 



NEW YORK: SUB-STATION 84 



