LIFE-HISTORY OF ROTIFER 255 



RoussELET, C. F. 1903 Liste der bis jetzt bekannt gewordenen mannlichen 

 Radertiere. Forschungsbericht aus der Biolog. Station zu Plon. Bd. 

 10, S. 172-176. 



Shtjll, a. F. 1912 Studies in the life cycle of Hydatina senta. Jour. Exp. 

 Zool., vol. 11-12, pp. 283-319. 



Stockard, Charles R. 1918 Further studies on the modification of germ- 

 cells in mammals; the effect of alcohol on treated guinea-pigs and 

 their descendants. Jour. Exp. Zool., vol. 26, pp. 119-226. 



Whitney, D. D. 1912 The effects of alcohol not inherited in Hydatina senta. 

 Amer. Nat., vol. 46, pp. 41-56. 



1917 The influence of food in controlling sex in Hydatina senta. 

 Jour. Exp. Zool., vol. 17, pp. 545-558. 



