154 SENESCENCE AND REJUVENESCENCE 



Johnson, H. P. 



1893. "A Contribution to the INIorphology and Biology of the Stentors," 

 Jour, of MorphoL, VIII. 



Ma UPAS, E. 



1888. "Recherches experimentales sur la multiplication des Infusories 

 cilies," Arch, de zool. exp., (2), VI. 



1889. "La rajeunissement karyogamique chez les cilies," Arch, de zool. 

 exp., (2), VII. 



Weismann, a. 



1882. iiber die Dauer des Lebens. Jena. 



Woodruff, L. L. 



1908. "The Life-Cycle of Paramecium When Subjected to a Varied 

 Environment," Am. Nat., XLII. 



1909. "Further Studies on the Life-Cycle of Paramecium," Biol. Bull., 

 XVII. 



1911a. "Two Thousand Generations of Paramecium," Arch.f. Protisten- 



kunde, XXI. 

 191 16. ''Paramecium aurelia and Paramecium caudatum," Jour, of 



MorphoL, XXII. 

 1913a. "Dreitausand und dreihundert Generationen von Paramecium 



ohne Konjugation oder kiinstliche Reizung," Biol. Centralbl., 



XXXIII. 

 1913&. "Cell Size, Nuclear Size and the Nucleo-cytoplasmic Relation 



during the Life of a Pedigreed Race of Oxytricha fallax," Jour. 



of Exp. Zool., XY. 

 1914. "On So-called Conjugating and Non-conjugating Races of Para- 

 mecium," Jour, of Exp. Zool., XVI. 

 Woodruff, L. L., and Erdmann, Rhoda. 



1914. "A Normal Periodic Reorganization Process without Cell Fusion 



in Paramecium," Jour, of Exp. Zool., XVII. 

 ZwEiBAUM, J. (Enriques et Zweibaum) . 



191 2. "La conjugaison et la differenciation sexuelle chez les Infusories: 



V, Les conditions necessaires et suffisantes pour la conjugaison du 



Paramoecium caudatum," Arch. f. Protistenkunde, XXVI. 



