The American Naturalist 



^ 7 with Special Reference to the Factors of Organic Evolution and Heredity 



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The Appl^tionof the Conce|tion^f P, ^ re ^'.^ rp ^ i ^ 



CONTENT8 OF THE MARCH NUMBER 



The Genotype^Conception of Heredity. Professor 



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 Notes and Literature : Mimicry, Dr. Frank E. Lutz. 





CONTENTS OF THE MAY NUMBER^ 



miorter^^plM°and M D^*^o^ A Neglected Paper 

 on Naturaf Sexton in toe English Sparrow. 

 Notes^and^Litemture : .BfdBi^fa^Yo^'a j^™^ 



OONTENT8 OF JUNE NUMBER 



Knowledge of the Extinct Amphibia. Dr. Rot 



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