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 



,**; 



It 



,> 



>': 



:**'. 



':*>' 



V 



"j:-; ::-,"i3fY ' 



. .--> -, -^ '"-: ' sji 



-r-Mliv- 7 ^- -?'.-' A, : 



-JS - -~ '-'I..* *l / , . , . *V 



Fig. 127. Formation of microgametes and fertilization of Klossia octopiana Schncid. 



[SlEDLECKI.] 



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

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

 gamete (F). The nuclei mix (G), 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- 



