Figure 157. Diagram of the normal process of endomixis in Trichodina sp. 1, normal 

 vegetative animal; 2, macronudeus fragmented and disintegrating, and not shown in sub- 

 sequent diagrams (the micronucleus has migrated to the other end of the body) ; 3, 

 micronucleus divided the first time; 4, micronucleus divided the second time; 5, micro- 

 nucleus divided the third time; 6, seven of the nuclei differentiating into macronuclear 

 Anlagen, while the eighth remains the functional micronucleus which divides before 

 each cell division; 7a and 7b, daughters resulting from the first cell division and having 

 four and three macronuclear Anlagen respectively; 8a and 8b, daughters resulting from 

 the second cell division (the 8b monomacronucleate individual is completely reorganized) ; 

 9a and 9b, daughters resulting from the third cell division (growth of the macronudeus 

 will reconstruct them into normal vegetative individuals). (From Diller, 1928.) 



