PLATE 17 



Fig. 16. Prophase of mitosis. The backward migration of one centrosome 

 and the new eytostome has begun. 



Fig. 17. Prophase of mitosis. The chromatin has become arranged in a 

 coiled spireme in the axis of the nucleus. 



Fig. 18. Equatorial plate stage. Note the posterior position of the new eyto- 

 stome and the paradesmose connecting the two centrosomes. Body inverted within 

 the cyst. 



Fig. 19. Abnormal type of anaphase. 



Fig. 20. Anaphase. Five chromosomes of unequal size may be distinguislied. 

 Note the separation of the paradesmose and the nuclear membrane. 



Fig. 21. Anaphase. Note the spindle fibers stUl connecting the two gi'oups 

 of chromosomes. Body inverted in cyst. 



Fig. 22. Late anaphase. Note the conical shape of the chromosomes. The 

 old eytostome appears reduced in size. 



Fig. 23. Telophase. Eeorgauization of the nuclei completed but paradesmose 

 still persisting. Note shortening and thickening of the parabasals and decrease 

 in the paradesmose. 



Fig. 2-1. Reorganization of the neuromotor apparatus of each set completed 

 but that of the nuclei stiU in progress. Note absence of paradesmose, anterior 

 location of the blepharoplasts, and parallel position of the schizonts. 



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