HEREDITY; SEX 425 



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communis var. pseudodonax. Ber. Deu. Bot. Gcs. 36 : 549-558. pi. 17. 

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Vries see Morgan 1919o). 

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I fig. 



WALTER, H. E. 1914. Genetics. New York. 



WALTON, A. C. 1918. The oogenesis and early embryology of Ascaris ram's Werner. 



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WENRICH, D. H. 1916. The spermatogenesis of Phrynotettix magnus with special 

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1917. Synapsis and chromosome organization in Chorthippus (Stenobothrus) 

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 WESTER, P. J. 1914. The determination of sex. Jour. Heredity 6: 207-208. 



(Account of work of CIESIELSKY on Cannabis and Spinacia.) 

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knowledge of heredity and variation in peas. Proc. Am. Phil. Soc. 66. 

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Pisum. Jour. Agr. Res. 11 : 167-190. 



WHITNEY, D. D. 1914. The influence of food in controlling sex in Hydatina senta. 

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1916. The control of sex by food in five species of rotifers. Ibid. 20: 263-296. 

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1917. The relative influence of food and oxygen in controlling sex in rotifers. 

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1919. The ineffectiveness of oxygen as a factor in causing male production in 



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1900. The Cell in Development and Inheritance. 2d ed. 



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