432 ANN BISHOP 



18. Maupas, E. (1885), — "Etude des Infiisoires cilies ", 'Archives de 



Zoologie experimentale et generale ', ser. ii, vol. 1. 



19. (1889). — "Le Rajeunissement karyogamique chez les cilies", 



ibid., vol. 7. 



20. Metalnikov, S. (1915). — " Sur la digestion intracellulaire chez les 



Protozoaires. La circulation des vacuoles digestives ", ' Bulletin 

 de rinstitut Pasteur ', no. 15. 



21. Mulsow, W. (1913). — "Die Conjugation von Stentor coeruleus und 



Stentor polymorphus ", ' Archiv fiir Protistenkunde ', Bd. 28. 



22. Pearl, R. (1906). — -"A Biometrical study of Conjugation in Para- 



moecium ", ' Biometrika ', vol. 5. Abstract in ' Proc. of the 

 Royal Society ', (B) 77. 



23. Penard, E. (1922). — 'Etudes sur les Infusoires d'eau douce', Georg 



et Cie, Geneve. 



24. Perty, J. A. (1852). — ' Zur Kenntniss kleinster Lebensformen ', Bern. 



25. Peters, A. W. (1907). — " Chemical studies on the cell and its medium. 



Part II. Some chemico- biological relations in liquid culture media ", 

 ' American Journal of Phj^siclogy ', vol. 18. 



26. Roux. — ' Fauna Infusorienne.' 



27. Simpson, J. Y. (1901). — " Observations on Binary Fission in the life- 



history of Ciliata ", ' Proc. Roy. Soc. Edinburgh ', vol. 23. 



28. Stein, F. (1867). — ' Der Organismus der Infusionsthiere ', Leipzig. 



29. Taylor, M. (1920).^ — "Aquarium cultures for Biological Teaching", 



' Nature ', April 22, 1920, no. 2634, vol. 105. 



29a. -"^otes on the collection and cultures of Amoeba proteus for 



class purposes ", ' Proc. Roy. Soc. Edinburgh ', vol. 20, part iv. 



30. Watters, F. A. (1912). — "Size Relationship between Conjugants and 



Non-conjugants in Blepharisma undulans ", 'Biolog. BuUelin', 

 vol. 23, no. 3. 



31. Woodruff, L. L. (1905). — "An experimental study of the life-history 



of Hypotrichous Infusoria ", ' Journal of Experimental Zoology ' 

 vol. 2, no. 4. 



32. Zweibaum, J. (1912).— "La conjugaison et la differentiation sexuelle 



chez les Infusoires. V. Les conditions necessaires et suffis antes 

 pour la conjugaison du Paramoecium caudatum ", ' Archiv fiir. 

 Protistenkunde ', Bd. 26. 



