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MAUPAS, E. 



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WEISMANN, A. 



1882. Uber die Dauer des Lebens. Jena. 



WOODRUFF, L. L. 



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

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

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19110. "Two Thousand Generations of Paramecium," Arch.f. Protisten- 



kunde, XXI. 

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Morphol., XXII. 

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



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



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

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WOODRUFF, L. L., and ERDMANN, RHODA. 



1914. "A Normal Periodic Reorganization Process without Cell Fusion 

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ZWEIBAUM, J. (ENRIQUES et ZWEIBAUM) . 



1912. "La conjugaison et la differentiation sexuelle chez les Infusories: 

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