CELL-DIVISION IN THE SEX CELLS OF TAENIA 219 
the result of the division of a large nucleus. If reconstruction 
should be completed, one daughter nucleus would le very near 
to, if not in actual contact with, two other nuclei of the same 
ovum. The other daughter nucleus would lie very near the 
periphery of the ovum. In figure G of the same plate is a re- 
construction which is the result of the division of a smaller nu- 
cleus than that in figure H. If reconstruction were to be com- 
pleted in this case, one daughter nucleus would lie in contact 
with one other nucleus of the same ovum, if not with two. These 
figures show, at least, that nuclei may lie in contact without 
having arisen from the same mother nucleus. If this be true, 
then the fact that two nuclei lie in ‘contact is no evidence that 
they have arisen by amitotic division. - 
d. The condition of the chromatin in the nucleus. Wilson says: 
‘‘Amitosis, or direct division, differs in two essential respects 
from mitosis. First, the nucleus remains in the resting state 
(reticulum), and there is no formation of a spireme or of chromo- 
somes. Second, division occurs without the formation of an am- 
phiaster.”” In my preparations many of the nuclei which lie in 
close contact have the chromatin in a more or less perfect spi- . 
reme. This is true, even in those nuclei which lie in such close 
contact that a definite boundary between them is not visible. 
The nuclei in the figures of plates 6 and 7 show this condition. 
Figure I, plate 5, shows four smaller nuclei in which the chro- 
matin is in a more or less finely granular reticulum, and a large 
nucleus in which the chromatin is in a connected spireme. 
Child has suggested that it is possible that the smaller cells 
are the result of amitotic division and the larger ones of mitotic 
division. His reason for this conclusion is that he has observed 
mitotic figures more often in large cells than in small ones. He 
also says that the cells are small because they haye divided more 
often than the large ones. Bu t,he further assumes that the 
process of division by amitosis is a more rapid process than by 
mitosis. I think that this assumption is hardly justified. It is 
true that there are more changes taking place in mitotic division; 
that is, that it is a more complicated process than amitotic division, 
but the length of time required for a cell to pass completely through 
