VOL. L, HO. 698 



OCTOBER, 1916 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Sciences with 

 Special Reference to the Factors of Evolution 



CONTENTS 



I. The Inheritance of Eye Pattern in Beans and its Relation to the Type of Vine. 



Dr. Frank M. Surface --------- 677 



H. Chromosome Studies on the Diptera. Dr. Charles W. Metz - - - M7 

 ni. The Shape of the Sternum in Scorpions as a Systematic and Phylogenetic 



Character. Dr. Alexander Petrcnkevitch - - - - - «00 



IV. Theories of Hibernation. Dr. Andrew Rasmcssen - - - - - *<>• 



V. Shorter Articles and Discussion: Variation, Correlation and Inheritance of 



Fertility in the Mammals. Dr. Arthur J. Harris. On a Barnacle 

 attached to a Fish. Dr. W. J. Crozier ------ 626 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. T. 



NEW YORK : SUB-STATION 84 



