230 



THE PROTOZOA 



brane, and three of the resulting nuclei are eliminated, while one fuses 

 with the female pronucleus, thus giving a striking analogue of the 



A^^-%, 





*•*■"■ 



,S~" 



mm 4Fm m 



c 



'0^^C, 



D 



F 



Fig. 127. — Formation of micrbgametes and feitilization of Klossia octopiana Schneid. 



[SlEDLECKI.] 



The chromatin of thf nucleus is distributed throughout the cell (.4, B), finally forming nuclei 

 of the iutnre gametes (C, D, E). The mature microgametes (s) swim about, and join a macro- 

 gamete (F). Thf nuclei mix (C), and then the cleavage nucleus divides repeatedly by mitosis to 

 form the spores (//). 



polar-body formation in Metazoa, or of the degenerate final divisions of 

 pro-conjugants in the other Protozoa. The formation of both macro- 



