250 RECENT CYTOLOGY 
chromosomes now change their position so that they 
come to lie in the plane of the equator of the spindle, 
and about this time, but sometimes earlier, each 
chromosome splits longitudinally into two equal 
portions (Figs. 22, 23). This splitting in the case of 
each chromosome takes place in the equatorial plane 
of the spindle, so that one member of each pair of 
daughter chromosomes faces towards one pole of the 
spindle, and the second towards the other pole. The 
members of each pair of daughter chromosomes now 
begin to move away from one another towards the 
two poles of the spindle, and as they do so the first 
indication of a dividing wall between the two new 
cells begins to make its appearance in the equatorial 
plane. 
Arriving at the poles, the daughter chromosomes 
begin to elongate, and to put out processes which 
finally meet and fuse with those of their neighbours 
to form the chromatin reticulum of the new nuclei 
(Fig. 25). Surrounding each new nucleus, thus 
developing at either pole of the now rapidly dis- 
appearing spindle, a new nuclear membrane makes its 
appearance ; the dividing wall in the position of the 
equator of the spindle develops into a complete 
partition (at least in the case of plants, in which, 
however, a number of minute passages are left pene- 
trating the cell-wall and preserving the communication 
between the protoplasmic contents ofthe separate 
cells); and the division into two new cells is thus 
completed (Fig. 26). Each new cell is provided with 
a nucleus into which has entered precisely its fair 
