// 



Fig. no. — Conjugation of Paramascium caudatum. [.-/-C, after R. Hertwic. ; D-K, after 

 Maupas.] (The macronuclei dotted in all the figures.) 



A. Micronuclei preparing for their first division. R. Second division. C. Third division; 

 three polar bodies or " corpuscules de rebut," and one dividing germ-nucleus in each animal. D. 

 Exchange of the germ-nuclei. E. The same, enlarged. F. Fusion of the germ-nuclei. G. The 

 same, enlarged. H. Cleavage-nucleus, {c) preparing for the first division. /. The cleavage- 

 nucleus has divided twice, y. After three divisions of the cleavage-nucleus; macronucleus 

 breaking up. K. Four of the nuclei enlarging to form new macronuclei. The first fission soon 



