Fig. 82. — Conjugation oi Paramcsairm caudatum. \A-C, after R. Hertwu;; D-K, after 

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



4 Micronuclei preparing for their first division. i?. Second division. C. Third division: 

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

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

 same enlarged. H. Cleavage-nucleus (t). preparing for the first division /. The cleavage- 

 nucleus has divided twice. J. After three divisions of the cleavage-nuc eus ; macronucleus 

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

 takes place. 



