i CELLS. 49 
(g) Each daughter nucleus then passes into the normal resting 
phase. The spindle disappears, and the centrosomes may 
also vanish. 
The essential fact is the exact partition of the nuclear material 
between the two daughter cells : 
Flemming gives the following summary of karyokinesis :— 
MOTHER NUCLEUS DauGHTER NUCLEUS 
(progressive changes). (regressive changes). 
a Resting stage. Resting stage. z 
& Coil. Coil. 
w ¢ Astroid. Diastroid. é 
» d Division of Astroid and its loops ——> 
(Prophases) (Metakinesis) (Anaphases). 
Fic. 25.—Karyokinesis.—After Flemming. 
1. Coil stage of nucleus ; ¢.c., central corpuscle. 
2. Division of chromatin elements into U-shaped loops, and longitudinal 
splitting of these (astroid stage). ‘ 
, 4. Recession of chromatin elements from the equator of the cell 
(diastroid). , 
5. Nuclear spindle, with chromatin elements at each pole, and 
achromatin threads between. 
6. Division of the cell completed. 
Besides the ordinary indirect division just described, the 
net result of which is that each of the two daughter cells 
gets an equal number of chromosomes, a precise half of 
each of the chromosomes in the original cell, there is 
another kind of cell division (meiotic or reducing division) 
which occurs only in the maturation of the ovum and 
4 . 
