PLATE XVI. 



Fig. 13. Anaphase. Massing of the cytoplasm at the center of the cell. 



Fig. 14. Anaphase. The long chromosomes (m) are to be seen in this 

 figure. 



Fig. 15. Anaphase. Shows relation of chromosomes to spindle during 

 this period. 



Fig. 16. Anaphase. Spindle fibers do not show here; reticular cyto- 

 plasm (drawn from a slide loaned by Mr. Alban Stewart). 



Fig. 17. Anaphase. Polar view ; 14 chromosomes. 



Fig. 18. Same as 17. 



Fig. 19. Telophase. Shows the loosening up of the chromosomes. Cell 

 plate beginning to form. 



Fig. 20. Chromatin has diffused throughout the nucleus ahead of the 

 cell-plate formation. A nuclear membrane has also been 

 formed. 



Fig. 21. Chromatin a dense mass, very indefinite at the ends of the cell, 

 not shown; cytoplasm much contracted from the cell wall and 

 concentrated about the spindle. 



Fig. 22, A very peculiar spindle; cytoplasm much condensed; a second 

 dense spindle formed about the center of the cell where the 

 cell-plate is appearing. Chromatin not shown. 



Fig. 23. Concentrated cytoplasm at the spindle center; a very broad 

 spindle and the cell plate extends entirely across it. Cytoplasm 

 vacuolated; the daughter nuclei, not shown in this figure, are 

 nearly reconstructed. 



Fig. 24. Cell plate nearly formed; nuclei reconstructed; cytoplasm con- 

 centrated at the center. (From slide belonging to Mr. Stewart.) 



