FERTILIZATION IN THE LIFE-HISTORY 43 



REFERENCES 



CALKINS, GARY N. 



1915. "Cycles and Rhythms and the Problem of 'Immor- 

 tality' in Paramecium," Amer. Naturalist, XLIX, 

 65-76. 



1916. "General Biology of the Protozoan Life Cycle,' 

 Amer. Naturalist, L, 257-70. 



CHILD, C. M. 



1915. Senescence and Rejuvenescence, pp. 481. The Univer- 

 sity of Chicago Press. 



JENNINGS, H. S. 



1912. "Age, Death, and Conjugation in the Light of Work 

 on Lower Organisms," Pop. Sci. Monthly, June, 

 1912. 



1913. "The Effect of Conjugation in Paramecium,^ Jour. 

 Exp. Zool., XIV, 279-391. 



JENNINGS, H. S., AND LASHLEY, K. S. 



1913. "Biparental Inheritance and the Question of Sexuality 

 in Paramecium" Jour. Exp. Zool., XIV, 393-466. 



MlNOT, C. S. 



1908. The Problem of Age, Growth, and Death. New York. 

 WOODRUFF, L. L. 



1915. "The Problem of Rejuvenescence in Protozoa," 

 Biochem. Bull., IV, 371-78. 



1917. "Rhythms and Endomixis in Various Races of 

 Paramecium aurelia," Biol. Bull., XXXIII, 51-56. 



1917. "The Influence of General Environmental Conditions 

 on the Periodicity of Endomixis in Paramecium 

 aurelia," Biol. Bull., XXXIII, 437-62. 



WOODRUFF, L. L., AND ERDMANN, R. 



1914. "A Normal Periodic Reorganization Process without 

 Cell-Fusion in Paramecium," Jour. Exp. Zob'l., XVII, 



425-516. 



