YOL. XLIX, SO. 586 



OCTOBER, 1915 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! with 

 Special Reference to the Factors of Evolution 



I. Early Portrayals of the Opossum. Dr. Charles R. Eastman. 



n. Seventeen Years Selection of a Character. Dr. Raymond Pearl - - - 

 HI. Specific and Varietal Characters in Annual Sunflowers. Professor T. D, A. 



Cock e r e ll . - -- -- -- -- -- - 



IV. The Inheritance of Douhleness inMatthiola and Petunia. I. The Hypotheses. 



V. The Coal Measure Amphibia and Crossopterygia. Dr. Roy L. Moodie 

 VI. Shorter Articles and Discussion.- An Anticipatory Mutationist. Dr. R. 

 Rttggl.es Gates. - -- -- -- -- - 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, H f . 



MEW YORK: SUB-STATION 84 



