VOL. XI, NO. 475 



JULY, 1906 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 DEVOTED TO THE NATURAL SCIENCES 

 IN THEIR WIDEST SENSE 



CONTENTS 



I. Adaptive Modifications of Occipital Condyles in Mammalia 



II. Living and Eossil Species of Comptonia 



m. Notes and Literature : Paleontology, Jordan's Guide 

 Fishes, Laiikester's Extinct Animals, Notes ; Geoloc, 

 Geology of the United States, Notes . 

 IV. Correspondence: The Danish Arctic Station . 



BOSTON, U. S, A. 

 GINN & COMPANY, PUBLISHERS 

 29 BEACON STREET 



