58 EISEN. [Vol. XVII. 



In this stage the leaders have contracted and have become 

 arranged in a typical bouquet form, but the spireme segments 

 are larger than the diameter of the nucleus and accordingly 

 twisted. The chromoplasts are large and connect with more 

 than two leaders (Fig. 12). 



Perfect Bouquet Stage. — The leaders have shortened and are 

 less bent and twisted ; they are nearly all of the same size 

 and only slightly longer than the diameter of the nucleus 

 (Figs. 13, 14). 



Bouquet with Split Spireme Segments. — The end of the 

 bouquet stages. The chromomeres have contracted into their 

 final number, or about twelve in each leader. Many of them 

 have split through the center, but have not yet separated. 

 The chromoplasts are generally only connected with one or 

 two leaders (Fig. 15). 



Separated Spireme. — The leaders are not any more in the 

 bouquet form, but their respective halves have separated from 

 each other to a greater or lesser extent, and many of them 

 cross each other in various directions. More than two leaders 

 are rarely attached to the same chromoplast (Figs. 16-23). 



Angular Spireme Segmetits. — The leaders have straightened 

 out, the chromomeres have fused, and the leaders diverge from 

 each other at sharp angles (Fig. 34). 



Irregular Bretzel. — The leaders have contracted sufficiently 

 to be termed chromosomes. They are not yet free but con- 

 nected with each other by chromoplasts, in twos or threes 

 (Figs. 24, 33, 36-46). 



Bretzel Metaphase. — The bretzel-shaped chromosomes are 

 in the equator of the central spindle (Figs. 47-53). 



V-shaped Anaphase. — The chromosomes have been pulled 

 apart as F's. (Figs. 54-56). 



Confluent Umbrella Stage. — The chromosomes and the chro- 

 moplasts are confluent, forming an umbrella-shaped body 

 (Figs. 57-61), which later becomes ring-shaped. 



Chrysanthemum Stage. — The chromosomes begin to reappear 

 and the spheres are being reconstituted. In this stage, as a 

 rule, the daughter-cells become separated, only remaining con- 

 nected by a spindle bridge. 



