CELL-DIVISION IN THE SEX CELLS OF TAENTA : 217 
perhaps, determined by the rate of division as described before. 
Therefore, the comparisons of length are by no means so certain 
as the position. Figure A, plate 7, shows a spindle, one pole of 
which is far from the periphery of the cell and the other lies in 
contact with a nucleus in the prophase. In figure C of the same 
plate is shown a spindle which has cytoplasm distributed almost 
equally around it, while figure B shows a spindle, neither pole of 
which lies near the periphery, yet one pole is very much farther 
from the periphery than the other. In figures D, E, G and I of 
the same plate are shown metaphase plates lying in different 
positions with reference to the other nuclei. In figure D are 
two metaphase plates which lie rather near each other, one of 
which is in close proximity to a small nucleus in which the chro- 
matin is in a more or less perfect spireme. In figure I is a meta- 
phase plate. surrounded by nuclei, the chromatin of which is 
in a reticulum or broken spireme. ‘These nuclei are of different 
sizes. In figure N, plate 5, the metaphase plate is somewhat re- 
moved from the other nucleus in the cell. From these facts it 
may be concluded that the mitotic figure may lie in almost any 
position with reference to the periphery of the cell and the other 
nuclei in the cell. 
c. Reconstruction of the nucleus. In the reconstruction of the 
nucleus the first mitotic structure to disappear is the spindle. 
Soon after its disappearance, the chromosomes become somewhat 
scattered and the centrosome becomes less clearly visible. The 
chromatin becomes more or less ragged and a light area appears 
around it. With the further breaking up of the chromatin the 
definite boundary between the cytoplasm and the nucleus appears. 
Some of the chromatin is distributed around the periphery of 
the nucleus. The reconstruction, or the rearrangement of the 
chromatin material may begin some time before the chromosomes 
have reached the poles, or it may not begin until they are very 
near the poles. Figures A to H inclusive, plate 5, show nuclei 
in different stages of the process of reconstruction, while figures 
I to J of plate 4, show the chromatin near the poles, but the rear- 
rangement of the chromatin has scarcely begun. In figure F, 
plate 5, the chromosomes have begun to assume the ragged ap- 
JOURNAL OF MORPHOLOGY, VOL. 24, No. 2 
