THE 



AMERICAN 

 NATURALIST 



A MONTHLY JOURNAL 

 Devoted to the Advancement of the Biological Science! ^ 

 Special Reference to the Factors of Evolution 



CONTENTS 



Heredity of Skin Pigmentation in Man. Gertrude C. Davenpor 



Spawn and Larva of imbystoma Jenersonianum. Professor W. H. Pib 

 The Inheritance of Sizes and Shapes in Plantf. Professor E. A. Emers 

 Shorter Articles and Discussion: The Modification of Mendelian Inheritai 

 External Conditions. Professor T. D. A. COCKERHIX - 

 Notes and Literature: Heredity, Dr. W. J. Sptllman. - 

 Index to Volume XLIV 



THE SCIENCE PRESS 

 LANCASTER, PA. GARRISON, N. T. 



NEW YORK : SUB-STATION 84 



