MITOSIS 



91 



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I ^ 



'^Vf^n^V^ 



r7-/-r 







S>^J. 



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i'. 



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Fig. 51. — Stages in the Nuclear Division of Acanthocijstis avideata in which 

 THE Central Granule Functions as a Centrosome ( x ca. 690). (After 

 SCHAUDINN, 1896.) 



1 . Ordinary individual, showing nucleus and central granule, from which radiate the axial fibres 



of the pseudopodia (axopodia). 



2, 3. Changes in nucleus nt ci mi men cement of division. 



4. Division of central L;iauiile ami iiu •leu- in s|i;reine stage. 



5, 6. Formation <>i eludmosoines in nucleus, a- it takes up a central position on the spindle 



which forms between the two granules. 



7. Disapijearance of nuclear membrane : formation of equatorial plate. 



8. Sejiaration of daughter plates of chromosomes. 



9. Cytoplasm dividing and two nuclei and central granules returning to the condition of individual 



at 1. 



