VOL. XLVI, HO. S52 



DECEMBER, 1912 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOITRNAL 

 Devoted to the Advancement of the Biological Sciences with 

 Special Eeference to the Factors of Evolution 



CONTENTS 



The Spawning Habits of the Sea Lamprey, Petn 



HTTS8AKOF 



Shorter Articles and Discnssion: A Simple Test < 



Notes and Literature : Notes on Ichthyology. Dr. 1 

 Index to Volume XLVI 



c Fowl. Dr. Eay- 



. . - - e 

 Professor Otto 



. morinut. DR. L. 

 . - - - 1 



Good new of Fit of 



THE SCIENCE PEESS 

 LANCASTER, PA. GARRISON, N. 



HEW YORK : SUB STATION 84 



