KARYOKINESIS 



249 



itself as a centre from which fine lines radiate to the equator, 

 forming the so-called " spindle " (Fig. 85). Each loop of 

 chromatin then splits longitudinally, and the resulting 

 halves retire to opposite poles of the cell along the lines 



of the spindle, so that the cell now contains two rosettes, 

 composed of loops whose free ends point outwards (Fig. 84, i). 



WiW 



mil 



This is the " dyaster " stage. The protoplasm of the cell 

 then divides equatorially ; the rosettes of each resulting 

 cell revert to the appearance of the original nucleus ; and 

 finally a nucleolus appears in both cases. 



