EFFECTS OF INBREEDING AND CROSSBREEDIN'G. 59 



LITERATURE CITED. 



Bruce, A. B. 



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 Davenport, C. B. 



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 East, E. M. 



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 East, E. M., and Jones, D. F. 



1920. Inbreeding and outbreeding. 

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1898. Unions Consanguines chez les columbins. L'lnterm^diare des Biol., 



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Fish, H. D. 



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1898. Versuche mit Kreuzungen von verschiedenen Rassen der Hausmaus. 



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