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Alverdes, P., 1920. Über die Vererbung von Abnormitäten (nach Unter- 

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Alvordes, F., 1920. Die Vererbung von Abnormitäten bei Cyclops. Zeitschr. 

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Arendsen Hein, S. A., 1920. Technical experiences in the breeding of 

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Baldwin, F. M., 1920. Susceptible and resistant phases of the dividing sea- 

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Italdwiu, W. M., 1920. Effects produced by X-Ray energy acting upon 

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Boekor, E . 1921. Regenerationsversuche an knospenden Hydren. Biol. 

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Boring, A. M. and Morgan, T. H., 1918. Lutear cells and hen-feathering. 

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Boring, A. M. and Pearl, R.5 1918. Sex studies XI. Hermaphrodite birds. 

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Bridges, C. B., 1920. The mutant crossveinless in Drosophila melanogaster. 

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Bridges, C. B., 1920. White ocelli, - an example of a slight mutant 

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Bridges, (" B., 1921. Proof of nondisjunction for the fourth chromosome 

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Bridges, C. B., 1921. Gametic and observed ratios in Drosophila. Amer. 

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Caniek, J., 1920. Investigations of the hair of different breeds of cattle. 

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dastle, W. E., 1920. The Genetics of the Dutch Rabbit — A Reply. Journ. 

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(lastle, W. E., 1920. Linked genes in rabbits. Science, N. S. 52. S. 156 

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('hild, V. M., 1920. Studies on the dynamics of morphogenesis and inheri- 

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