701. XLV, NO. 536 



AUGUST, 1911 



THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! with 

 Special Reference to the Factors of Evolution 



CONTENTS 



Page 



I. A Comparative Microscopic Study of the Melanin Content of Pigmented i 



Arthur Harris 471 



m. The Adaptations of the Primates. Professor F. B. Loomis - - - - *79 

 IV. Jean Marchant, an Eighteenth Century Mutationist. Dr. Henri Hps • - 493 

 V. Notes and Literature : Notes on Heredity. Dr. W. J. Spiixman - - - 507 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. T. 



NEW YORE : SUB-STATION 84 



