508 J. A. DAWSON 



Hertwig, R. 1889 tjber die Conjugation der Infusorien. Abhandl. d. k. 



bayer. Akad. Wiss. Mimchen, Bd. 17, Abth. 1. 

 Jennings, H. S. 1906 Behavior of the lower organisms. Columbia University 



Press. 



1913 The effect of conjugation in Paramecium. Jour. Exp. Zool., 



vol. 14. 



1910 What conditions induce conjugation in Paramecium? Ibid., 

 vol. 9. 



JotJKOWSKY, D. 1898 Beitrage zur Frage nach den Bedingungen der Vermehr- 



ung und des Eintritts der Konjugation bei den Ciliaten. Verhandl. 



naturhist.-Med. Ver. Heidelberg, Bd. 6. 

 Lebedew, W. 1908 tJber Trachelocerca phenicopterus Cohn. Archiv f. 



Protistenk., Bd. 13. 

 LeDantec, F. 1897 La regeneration du micro-nucleus chez quelques Infusoires 



Cilies. C. R. Acad. Sci. Paris, T. 125. 

 Lewin, K. R. 1910 Nuclear relations of Paramecium caudatum during the 



asexual period. Proc. Camb. Phil. Soc, vol. 16. 



1911 The behavior of the infusorian micronucleus in regeneration. 

 Proc. Roy. Soc. Lond., ser. B, vol. 84. 



Matjpas, E. 1888 Recherches experimentales sur la multiplication des Infu- 

 soires cilies. Arch. d. zool. exp. et gen., 2 S., T. 6. 

 1889 Le rajeunissement karyogamique chez les cilies. Ibid., 2 S., 

 T. 6. 



Metcalf, M. 1909 Opalina. Its anatomy and reproduction with a descrip- 

 tion of infection experiments and a chronological review of the lit- 

 erature. Arch. f. Protistenk., Bd. 13. 



MiNCHiN, E. A. 1912 An introduction to the study of the Protozoa. London. 



Neresheimer, E. 1907 Die Fortpflanzung der Opalinen. Arch. f. Prot. 

 Suppl. 1. 



1908 Fortpflanzung eines parasitischen Infusors (Ichthyophthirius). 

 Sitz.-Ber. d. Ges. f. Morph. u. Phys. Miinchen., Bd. 23. 



PoPOFF, M. 1907 Depression der Protozoenzelle und der Geschlechtzellen der 

 Metozoen. Archiv f. Protistenk., Suppl. Bd. 1. 



Stokes, A. C. 1888 A preliminary contribution toward a history of the fresh- 

 water Infusoria of the United States. Jour. Trenton Nat. Hist. Soc, 

 vol. 1. 



Woodruff, L. L. 1905 An experimental study on the life history of hypotri- 

 chous Infusoria. Jour. Exp. Zool., vol. 2. 



1908 The life cycle of Paramecium when subjected to a varied environ- 

 ment. Amer. Nat., vol. 42. 



1911 The effect of excretion products of Paramecium on its rate of 

 reproduction. Jour. Exp. Zool., vol. 10. 



1913 Cell size, nuclear size and the nucleo-cytoplasmic relation dur- 

 ing the life of a pedigreed race of Oxytricha fallax. Ibid., vol. 15. 



1914 So-called conjugating and non-conjugating races of Paramecium. 

 Ibid., vol. 16. 



Woodruff, L. L., and Erdmann, Rh. 1914 A normal periodic reorganization 

 process without cell fusion in Paramecium. Jour. Exp. Zool., vol. 17. 



