i6o 



N. M. STEVENS. 



which Fig. 15 is a part, in Fig. 16. Many of them are \idently 

 parasynaptic pairs attadu-d to ^pindle libers at OIK- end, others 

 are similar pairs attadn-d in the middle and pulling apart in the 



18 



19 



22 



24 



23 



26 



<* 



a 



25 



27 



FIG. 18. The heterochromosome paii \ y i il 



FIG. 19. Metakinesis. 



FIG. 20. Anaphase. Heterochromosonn p.m -till muli\iM. 1. 



Newly formed spindle; chruiiici-(>nii'~ \\i-ll ailvunrnl in inrtakinc-i-. 

 Older spindle; metakinesis hardl) l'_;iin. 

 FIG. 23. Spindle forming with chromatin in lurm oi a tliic k -piicnic. 

 FIG. 24. Anaphase; chromosome a separating as .1 pair <>t 1 

 FIGS. 25-27. Chromosome a in the t'im <>i a -plit l.aii'l. |ia--in.v; into a 

 form in metakinesis. 



FIG. 21. 

 FIG. 22. 



