CELLULAR DIVISION 

 csm 



17 



csm 



nuoleole 



chr-\ 



I*EG. 1. — DlAGBAM OF KiEYOKINESIS (AITEK WiLSON). 

 {By permission of Mr. Edward Arnold.) 



A, Cell in state of rest (M«i = centrosome). B, chromatin (chr) coiled in 

 chain-like shape. Centrosome halved and surrounded by aster. 

 C, spindle formed, nuclear membrane dissolving (sp = spindle; 

 cSr= chromosomes now distinct). D, karyokinetic figure {csph = 

 centrospheres, forming poles). F, chromosomes definitely halved, 

 aggregated at the poles. G, the new nuclei, after completion of 

 karyokinesis (ras = nucleus ; &sm=centrosome). 



2 



