VOL. XLVIII, HO. S69 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! with 

 Special Reference to the Factors of Evolution 



Ectoparasites of Mammals. Professor Vernon Lyman Kelloog - 

 generation, Variation and Correlation in Tnyone. Professor John W. 



rms relating to Generic Types. Dr. O. F. 



I and Literature : Linkage in the Silkworm Moth. A. H. StohtBTANT. 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. T. 



NEW YORK: SUB-STATION 84 



