204 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Skr. 



EXPLANATION OF PLATE XXXIX. 



Fig. 13. Shows the part of the reticulum inside of the granular zone begin- 

 ning to be drawn out into cones. In many places, the reticulum 

 is still continuous from the chromosomes to the cell-wall. 



Fig. 14. Represents an early multipolar stage. There is no longer a reticu- 

 lum inside of the granular zone. It has been drawn out at 

 various points to form cones in which the meshes have been 

 gradually stretched until now they form free fibers. These 

 cones and free fibers extend in all directions. 



Fig. 15. The poles of the muhipolar spindle lying within the granular zone 

 show a tendency to gather into two groups which are probably 

 destined to form the poles of the bipolar spindle. 



Figs. 16 and 17. Represent very late multipolar stages with the poles fusing. 

 The granular zone is clearly evident in each. 



Fig. 18.' The poles have fused completely, forming a sharply pointed 

 spindle. 



