MALE-PRODUCTION IN HYDATINA 161 



BIBLIOGRAPHY 



Maupas, E. 1891 Sur la determinisme de la sexualite chez I'Hydatina senta. 



Comp. Rend. Acad. Sci., Paris. T. 113, pp. 388-390. 

 Mitchell, C. W. 1913 Sex determination in Asplanchna amphora. Jour. 



Exp. Zool., vol. 15, no. 2, pp. 225-255. 

 NussBAUM, M. 1897 Die Entstehung des Geschlechtes bei Hydatina senta. 



Arch. f. Mikr. Anat. u. Entw., Bd. 49, pp. 227-308. 

 • Shull, A. F. 1911 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. 



Jour. Exp. Zool., vol. 10, no. 2, pp. 117-166. 



1912 Studies, etc. III. Internal factors influencing the propor- 

 tion of male-producers. Jour. Exp. Zool., vol. 12, no. 2, pp. 283-317. 



1913 Eine kiinstliche Erhohung der Proportion der Mannchenerzeuger 

 bei Hydatina senta. Biol. Contralb., Bd. 33, Nr. 9, Sept. 20, pp. 

 575-576. 



1915 Periodicity in the production of males in Hydatina senta. Biol. 

 Bull., vol. 28, no. 4, pp. 187-197. 

 Whitney, D. D. 1909 Observations on the maturation stages of the parthe- 

 nogenetic and sexual eggs of Hydatina senta. Jour. Exp. Zool., vol. 

 6, no. 1, pp. 137-146. 



1914 The influence of food in controlling sex in Hydatina senta. 

 Jour. Exp. Zool., vol. 17, no. 4, pp. 545-558. 



THE JOURNAL OF JiXPERIMENTAL ZOOLOGY, VOL. 21, NO. 1 



