PEDOGAMY 



87 



:-',1^. 



w 













3 







'WW 



// ^^ 



Fig. 50. — Pedogamy in Actiriophri/s sol, Ehrenberg ( x ca. 800). (After 

 Belak, 1923.) 



1 . Loss of pseudi)])odia and their axial filaments. 



2. First nuclear division and commencing formation of gelatinous cnvelii])e. 



3. Two gamete nuclei in early division stage in the dividing cyti|iiasin within the cyst membrane. 



4. Two sejiarate gametes each with a nucleus in process of first niatuiation division (reduction 



division). 



5 . Later stage of reduction division of the gamete nuclei: the chromosomes in conjugation. 



. Two later stages in the reduction division of the gamete nuclei. 



7. Completion of the reduction division: each gamete has a nucleus and a reduction body (de- 

 generate nucleus). 



[Continued on j)- 88. 



