HEREDITY IN THE PROTOZOA 



301 



four of the nuclei enlarge to form macronuclei, 

 four others remain as new micronuclei. Then the 

 individual divides twice (Fig. 70). The macro- 



Fig. 71. — Diagram illustrating the history of the micronuclei in the 

 conjugation and t'.vo suhscfpicnt divisions of Paranioociuni. 



nuclei and micronuclei do not divide at this time, 

 but are distributed eciually to each of tlie first two 

 individuals, and then at the second division two go 



