SPECIAL MORPHOLOGY OF THE PROTOZOAN NUCLEUS 



269 



observations, in two cases at least, there is positive evidence that 

 the extra-nuclear centres originate in the nucleus {Acanthocystis, 

 Oxyrrhis). 



Fig. 142. — Paramaba cilhardl Schaud. [SCHAUDINN.] 

 A. Section. B. Speculation. C-H. The flagellated swarm-spores in process of division, k, 

 the Nebenkbrper ; n, the nucleus which wraps itself around the division-centre {Nebenkbrper). 



In Paramceba, although the division-centre {Nebenkbrper) appar- 

 ently plays no part in the nuclear division of the mother-animal, its 

 daughter-parts play the same role in division of the swarm-spores as 



