Hara, Mitosts in Nerve Cells. 287 
not lose its peculiar staining character, showing always the 
same intensity of the color. By this character it can easily be 
distinguished from the other substance. The linin, on the 
other hand, stains very faintly, but slightly deeper than the 
cytoplasmic reticulum. According to Levi, the nucleolar sub- 
stance (acidophile part), forms only the ‘‘Halbspindelfasern,”’ 
while the central spindle is formed by the linin alone. Our 
preparations however, show that the latter is not formed by 
the linin only, but also by the acidophile substance of the nu- 
cleolus. When two daughter chromosomes retreat toward op- 
posite poles; then they are connected by delicate filaments 
composed of both linin and nucleolar substance. In most cases, 
the nucleolar substance can be detected very easily, since this 
substance clings to the linin filaments of the central spindles 
forming thick masses of irregular outline (Figs. 16 and 17). 
Another important and conspicuous change affects the cell-body 
which is transformed from the primitive spherical to the oval 
form. 
Following the stage shown in Fig. 16, there is retraction 
of the two groups of daughter chromosomes toward their own 
poles (Fig. 18) until they reach two centers of the oval body 
(Fig. 18). Fig. 18 is a last stage in the anaphase, and presents 
the beginning of the division of the cell-body. The central spin- 
dle is still noticeable in this figure. From this stage on, the cen- 
tral spindle loses its affinity for the coloring reagents employed 
in this investigation, and at the same time loses the regular 
parallel arrangement of its filaments which re-form into the 
cytoreticulum. 
D. Germinal Cells in the Telophase. Fig. tg is one of 
the newly formed daughter cells, containing half of the chrom- 
osomes formed in the dividing cell. When the cell-body has 
been divided into two, then the regressive processes take place 
in each daughter chromosome, that is, the chromatic figure 
which presents an arrangement similar to that of the last stage 
of the anaphase (Fig. 18) is transformed gradually into that of 
the nucleus in the resting stage. Fig. 19 shows one of the 
daughter cells in the earliest stage of the telophase. The 
