PERIODIC REORGANIZATION IN PARAMAECIUM 



471 



Thus the distribution of the two macronuclear anlagen took 

 place in the 4190th generation, which affords further proof that 

 the two ynacronuclear anlagen are distributed hy one cell division to 

 each of the resulting sister cells. 



In Line III and its branches, Ilia, Illb, IIIc, the process was 

 actually observed six times, while undoubtedly it also occurred 

 several' times unobserved, judging by the division rate and the 

 periodic occurrence of the process in sister lines (see table 2 

 and text fig. 17). 



ii 



h 



III 4240i III 42402 III 42403 III 4240^ 



Text figure 13 



III 4241 



The Lines I, II, IV, V, which were not branched, show the 

 process a total of seven times, each time at due periods coin- 

 ciding with Line VI. Some of the stages observed in these lines 

 are presented in the plates as they supplied some of the details 

 of the process as, for example, Line II, 4069th generation (fig. 

 9, pi. 1) which give a particularly clear idea of the extrusion of 

 the chromatin bodies. 



One point which is shown by a study of tables 1, 2, and 3, 

 which give the life history of the twenty-one lines, is the occur- 

 rence of death in certain instances during the process. Of these 



