References 229 



Phrynotettix magnus with special reference to synapsis and the indi- 

 viduality of the chromosomes. Bui. Mus. Comp. Zool. Harvard, 60:57- 

 133. Wilson, E. 13., 1910. The chromosomes in relation to the deter- 

 mination of sex. Science Progress, No. 16:570-592. Id., 1911. Studies 

 on chromosomes. VII. A review of the chromosomes of Nezara; with 

 some more general considerations. Jour. Morph., 22:71-110. Wolf, P., 

 1909. tiber Modifikationen und experimentell ausgeloste Mutationen 

 von Bacillus prodigiosus und anderen Schizophyten. Zeitschr. f. ind. 

 Abst. u. Vererb., 2:90-132. Woodruff, L. L., 1914. So-called cojiju- 

 gating and non-conjugating races of Paramecium. Jour. Exp. Zool., 

 16:237-240. Id., 1915. The problem of rejuvenescence in Protozoa. 

 Biochem. Bui., 4:371-378. Id., 1917. Rhythms and Endomixis in Vari- 

 ous Races of Paramecium aurelia. Biol. Bui., 33:51-56. Id., 1917 a. 

 The influence of general environmental conditions on the periodicity of 

 endomixis in Paramecium aurelia. Biol. Bui., 33:437-462. Woodruff, 

 L. L., and Erdmann, R., 1914. A normal periodic reorganization process 

 without cell fusion in Parameciumu Jour. Exper. Zool., 17:425-518. 



Young, R. T., 1917. Experimental induction of endomixis in Para- 

 mecium aurelia. Jour. Exper. Zool., 24:35-53. 



Zeleny, C., and Mattoon, E. W., 1915. The effect of selection on the 

 "bar-eyes" mutant of Drosophila. Jour. Exper. Zool., 15:515-529. 

 Zweibaum, J., 1912. La conjugaison et la differenciation sexuelle chez 

 les infusoires (Enriques et Zweibaum). V. Les conditions ne"cessaires 

 et suffisantes pour la conjugaison du Paramecium caudatum. Arch. f. 

 Protistenkunde, 26 : 275-393. 



