INFLUENCE OF INBREEDING ON HYDATINA SENTA. 13 



Spermatozoon. Journ. Exp. Zool., Vol. 12, No. 4, May, pp. 413-454, 

 ii pis. 

 Moenkhaus, W. J. 



'n The Effects of Inbreeding and Selection on the Fertility, Vigor and Sex 



Ratio of Drosophila ampdophila. Journ. Morph., Vol. 22, pp. 123-154. 

 Papanicolau, G. 



'10 Experimented Untersuchungen iiber die Fortpflanzungsverhaltnisse der 

 Daphniden (Simocephalus vetuhis und Moina recliroslris var. Lilljeborgii). 

 Biol. Centralb., Bd. 30, No. 21-24. 

 Ritzema Bos, J. 



'94 Untersuchungen iiber die Folgen der Zucht in engster Blutverwandtschaft. 



Biol. Centralb., Bd. 14, pp. 75-81. 

 Shull, A. F. 



'n Studies in the Life Cycle of Hydatina senta. II. The Role of Temperature, 



of the Chemical Composition of the Medium, and of Internal Factors upon 



the Ratio of Parthenogenetic to Sexual Forms. Journ. Exp. Zool., Vol. 10, 



No. 2, Feb., pp. 117-166, 



'12 III. Internal Factors Influencing the Proportion of Male-producers. 



Ibid., Vol. 12, No. 2, Feb., pp. 283-317. 

 Shull, G. H. 



'08 The Composition of a field of Maize. Rept. Amer. Breed. Assn., Vol. 4, 



pp. 296-301. 

 Wellington, R. 



'12 Influence of Crossing in Increasing the Yield of the Tomato. Bull. 346, 



N. Y. Agr. Exp. Sta., Geneva, pp. 57-76. 

 Whitney, D. D. 



'12 Reinvigoration Produced by Cross-fertilization in Hydatina senta. Journ. 



Exp. Zool., Vol. 12, No. 3, April, pp. 337-362. 

 Woltereck, R. 



'n Uber Veranderung der Sexualitat bei Daphniden. Experimentelle Unter- 

 suchungen iiber die Ursachen der Geschlechtsbestimmung. Internat. 

 Rev. d. ges. Hydrobiol. u. Hydrogr., Bd. 4, Heft i and 2, pp. 91-128. 

 Woodruff, L. L. 



'n Two Thousand Generations of Paramecium. Arch. f. Protistenkunde, Bd. 

 21, No. 3. 



