Hl'LIOZOA 85 



Each divides mitotically twice, throwing out as a polar body one 

 product of each division. The first of these two divisions is a reduction 

 division. The two individuals now fuse, one behaving as a male by 



T^;^^W. 



.-»*a«=*^ 



Fig. 72. A-F, Successive stages in the autogamy of Actinophrys sol. After 

 Belar. ecp. ectoplasm; enp. endoplasm; ./.ielly coat;^^. pseudopodium put 

 out by 3, the male gamete, towards ?, the female gamete. 



sending out a pseudopodium towards the other, and a strong inner 

 cyst forms around the zygote. After a while the latter undergoes 

 binary fission and the two products escape from the cyst. Occasion- 

 ally two individuals enter a jelly cyst together and then either the two 



