^4 BOTANICAL GAZETTE [jan-uary 



chromat 



recogn 



shows the main body of individual chromosomes 

 shape, notwithstanding the nucleus grows considerably In size after 

 the formation of the membrane. No nucleolus was observed in the 

 daughter nucleus {figs. 40, 41). The nucleus in such a condition is 

 ready for the second mitosis. 



Graxtlar zoxe dividixg the spore mother cell.— Durmff 



fine fibrillar structure 



asm 



arransred 



running from the poles cross in the equatorial region near the cell 

 wall, where the cytoplasm begins to be transformed into the granules 

 of this stage. After the organization of the daughter nucleus, the 

 granules begin to increase and proceed rapidly toward the center along 

 an equatorial plane of uniform thickness {fig. 38), at first avoiding 

 only the space which was occupied by the central spindle {fig. 39). 

 At last even the middle Darts of the rpntml cr.m.n<. Tx..^ ^^r.in^^^ 



granules 



hemisph 



granuli 



greate 



of the central spindle, which contributes to the formation of the 

 granules, returns into the fibriUar structure of the cvto 



)lasm 



ase 



Chromosomes of homotypic division. — As 



cribed 



the daughter chromosomes which entered into the reconstruct 



daughter nuclei do not lose their individuality, but it is possible to 



recognize their identity even after they are combined and anastomosed 



together into a reticular structure {fig. 41). The recognizable V 



elements in the nucleus of the second division are what undoubtcdly 



resuited from the influence of the vacuolization on the line of the 



longitudmal fission of the daughter chromosomes in the first mitosis 

 durm 



ase 



o 



gan at the last telophase doe 



have been maintained, for the closed andes 

 on both upper and lower sides of the 

 as sho^m in fig. 42. Such a change 



O 



ar growth miirht easilv 



