ELEMENTS OF MICROBIAL CYTOLOGY 



29 



move to the two poles where they make two polar plates. The cen- 



trioles located here seem to have some attraction for the chromosomes. 



Finally comes the telophase or phase of reconstitution of the two 



nudei which terminates the process. In this phase, the chromosomes 



lL£ii.v 



B 



b 



f -1 i ; 



I 



Fig 10 — Karyokinesis (metamitosis). A, Acanthocystts acukata; {a) nudeus 

 in state of repose with an intranuclear centriole; (6) (prophase^ the centriole moves 

 to the periphery and out of the nucleus and forms an aster U/fer Hertwig); {c) the 

 ^vision of the centriole and spireme; (d) the formation of the equator^l plates^and 

 Srachromatic spindle; (e) equatorial plates; (/) anaphase; (g) telophase (After 

 Schaudinn.) B, In CoUosporium seneaoms (Uredmeae). (a) Nucleus. at rest wi^ 

 itTcentriole extranuclear; (6) formation of chromosomes; (c), equatorial plate; (</) 

 meSSe;(f anaphase;' (/)(g) W telophase, ^fler Madame Moreau.) 



form a spiral chromatic cluster making a spireme at each of the poles 

 (dispireme stage, Fig. i9,^,«); each of the spiremes is then surrounded 



