The American Naturalist 



A Monthly Journal, established in 1867. Devoted to the Advancement of the Biolorfcal Science, 

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



Variation. In Urosalpinx. Dr. Herbert Eugenm 

 Nuclear Phenomena of Sexual Reproduction in Gym- 



Bperma. Professor D. M. Mottiee. 

 Shorter Articles and Discussion : Sterility, Dr. Max 



Notes and Literature : Note* on Ichthyology, President 



CONTENTS OF THE NOVEMBER NUMBER 



Shorter Articles and Discussion: The Arithmetic of the 



Theta her^ceofSizea and Shapes in Plants. Professor 



CONTENT8 OF THE JANUARY NUMBER 



Dr. D. T. MacDouqal. 



Notes and Literature: Heredity, Dr. W. J. Spiluia.v. 

 Index to Volume XLIV. 



Notes and Literature : Heredity, Dr. W. J. Smllkas. 



CONTENTS OF THE FEBRUARY NUMBER 



Linfited Inheritance" aud^to* Sexu^Dimo'rp'hism! 



The^Genotji* Hypothesis and Hybridisation. Pro- 



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