8 BOTANICAL GAZETTE 



[jA>raARY 



be vacuolized, i. e., chromatin materials 



the chromosomes in their compact condition become locaUzcd in an 

 irregular way, in some places becoming quite loose, and in others 

 still remaining as a dense aggregation. All the chromosomes 

 undergoing this change are associated, the ultimate result 



be 



mass of chromatin material 



(fig. lo). By the interaction between the cytoplasm which surround 

 these vacuoHzed masses and nuclear sap which may be secreted withii 



membrane . As 

 grows in size [fig. 



chromosomes, there is formed 

 sap increases in amount, th 



membrance is always concave {fig 



time 



ghter chromo 



somes pomted to the pole are drawn together toward the pol 

 to come nearer, and that in this position vacuolization has pro( 

 It seems probable that the vacuolization is more pronounced 



oun 



chromatin material is rather scanty at the region of the 



immediately 



appear {fig. ij). It may turn 

 :onstructed shows nolan'tv. 



Coincident with the construction of the daughter nuclei there appear 

 granules in an equatorial plane upon fibers of the central spindle. 

 The granules first make their appearance upon the fibers in the central 



tne equatorial plane and 



periphery. It 



seems reasonable that the fiber substance has contributed the material 

 for the formation of the granules. 



Contemporary with the completion of the cell wall, growili of the 

 daughter nuclei continues and the chromatin material assumes again 

 a ragged structure on account of further continuation of vacuolization. 

 The general outline of the daughter nucleus becomes nearly spherical 



there is established the resting nudeus of the succeeding mitosis 



(fig- 



The processes of nuclear division from the reticulum of the resting 

 condition to the reconstruction of the next resting nucleus are carried 

 on as described above in any vegetative mitc^is in Xcphrodium and 



