REPROD UCTION 59 



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DoFLEiN, F. AND E. Reichenow. 1929 Die Lehrbuch der 

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Erdmann, Rhoda and L. L. Woodruff. 1916 Periodic re- 

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Gregory, L. H. 1923 The conjugation of Oxytricha fallax. 

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Kudo, R. 1924 A biologic and taxonomic study of the Micro- 

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MacDougall, M. S. 1925 Cytological observation on gymno- 

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Woodruff, L. L. and Rhoda Erdmann. 1914 A normal 

 periodic reorganization process without cell fusion in Para- 

 mecium. Jour. Exper. Zool., Vol. 17. 



