PLATE 41 



Fig. 14. Semi-composite view of mieleus in metaphase; the enJosome has 

 elongated, and its upper end is at a deeper focal plane than the lower. The 

 rhizoplasts could not be traced from the blepharoplasts. 



Fig. 15. Nucleus elongated in later metaphase; endosome now extends from 

 one end of the nucleus to the other, and the free ends of the chromosome pairs 

 have begun to migrate. 



Fig. 16. Nucleus in late metaphase, or ' equatorial plate ' stage. The free 

 ends of the daughter chromosomes have now reached the poles of the endosome, 

 but the other ends are still attached at the equator. The reservoir and gullet have 

 vridened with the migration of blepharoplasts and flagella. 



Fig. 17. Nucleus in ' equatorial plate ' stage. The blepharoplasts are con- 

 nected by a paradesmose, and from each a rhizoplast extends to the nucleus. 



Fig. 18. The ends of the daughter chromosomes are beginning to separate 

 at the equator in the early anaphase. Blepharoplasts still connected by the 

 paradesmose. 



Fig. 19. Nucleus in early anaphase, showing complete separation of the 

 daughter chromosomes; the daughter groups are connected by the middle portion 

 of the endosome. Blepharoplasts still connected by the paradesmose. 



Fig. 20. End view of nucleus at approximately the stage shown in figures 17 

 and 18. 



Fig. 21. Optical section of the nucleus shown in figure 20, at a plane about 

 one-third the distance from the upper end. Note, with figure 20, the parallel 

 arrangement of the chromosomes. 



Fig. 22. Later anaphase ; the daughter nuclei are distinctly constricted ; the 

 chromosomes are still parallel to the endosome. 



Fig. 23. Later anaphase, showing further separation of the daughter nuclei. 



Fig. 24. Early telophase. Constriction is just completed. The chromosomes 

 of the daughter nuclei are still parallel to the endosomes. 



Fig. 25. Later telophase. The daughter nuclei have rounded up and regene- 

 ration has begun. Cell division is nearly completed. 



[476] 



