(22) Neue Literatur. 



Schmidt, J., 1920. Racial Studies in Fishes. IV. Experimental investigations 

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Schmidt, J., 1920. Racial investigations. V. Experimental investigations 

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Schultz, W., 1920. Kälteschwärzung eines Säugetieres und ihre allgemein- 

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Shore-Bailey, W., 1918. Hybrid wigeon. Avic. Mag. 10. S. 15—16. 



Shiili, A. F., 1918. Relative effectiveness of food, oxygen and other sub- 

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Slye, M., 1920. The relation of pregnancy and reproduction to tumor 

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Slye, M., 1920. The relation of inbreeding to tumor production. Studies 

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Stieve, H., 1920. Der Einfluß von veränderten äußeren Bedingungen auf 

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Stieve, H., 1920. Die inkretorische Tätigkeit der Keimdrüsen und ihr Ein- 

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Stockard, Ch. R., 1920/21. Developmental rate and structural expression: An 

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Stockard, C. R. and Papanicolaou, (i. N., 1920. Variations of structural 

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Strong, L. C, 1920. Roughoid, a mutant located to the left of sepia in the 

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Sturtevant, A. H., 1920. Intersexes in Drosophila simulans. Science, N. S. 

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Sturtevant, A. H., 1921. The north American species of Drosophila. Carnegie 

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Sturtevant, A. H., 1920. Genetic studies on Drosophila simulans. I. Intro- 

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Sturtevant, A. K., 1920. The vermilion gene and gynandromorphism. Proc. 

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Sumner, F. B., 1920. Geographic variation and mendelian inheritance. 

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Toldt jr., K., 1920. Über Hautzeichnung bei Säugetieren infolge des Haar- 

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Trachtenberg, H. L., 1921. The analysis of the Results of Professor Jo- 

 hannes Schmidts Diallel Crossing with trout. Journ. Genetics. 11. 

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