vBry 



Fig. 23. — Karyokinesis. (After Flemming.) 



I, Coil stage of nucleus ; cc centrosome ; 2, Division of chromatin into U-shaped loops, 

 and longitudinal splitting of these (astroid stage) ; 3, 4, Recession of chromosomes from the 

 eiuatorof the cell (diastroid) ; 5, nuclear spindle with chromosomes at each pole, and achro- 

 matin threads between ; 6, Division of the cell completed. 



[Facing p. 102. 



