The American Naturalist 



A Monthly Journal. e,t«bli.hed in 1867, Devoted to the Advancement of the Biological Science, 

 with Special Reference to the Factor, of Organic Evolution and Heredity 



OONTENT8 OF THE MAY NUMBER 



^Vivi 1 ( ^c^ 1C prof I>0lyT j 0rphI Hf G 111 * 1 Sex in Colias 

 KnC M!Sr.j5S. d F C Guy P er m iD Heredity ' "^feasor 



CONTENTS OF JUNE NUMBER 



The Biometric Proof of the Pure Line Theory. Dr. J. 

 The Influence of Changed External Conditions on 



Shorter Articles and Discussion : The Ontogeny of a 



CONTENTS OF JULY NUMBER 



^TeS ?whS S Their si & nifican ee. Pro- 

 F ^iMn r o^^ a ouv^ n p h HlT! e ° f Saur °P° dou » 

 Shorter Artgwand Correspondence ^Computation of 



Not «ioSS^^2a2' w Secent 8tt!,!!es on Vari * 



Jean Marchant, an Eighteenth Century Mutationist. 

 Note^and Literature : Notes on Heredity. Dr. W.J' 



^ CONTENTS OF SEPTEMBER NUMBER 



Raymond*?' ;'ouc|p\ Ar ^" 



CONTENTS OF OCTOBER NUMBER 



Single Number 35 Cent. Yearly Sub«ription, $4.00 

 Th. NATURAUST will b. «», to «„ „b«x,b«r. for four month, for On. DoIUr 



THE SCIENCE PRESS 



Uam * on » N ' Y - Sub-Station 84 : NEW YORK Lancaster, ?*-J 



