286 JouRNAL OF CoMPARATIVE NEUROLOGY. 
some, form two rows on either side of the equatorial line and 
parallel to it. This complicated structure is clearly visible in 
Figs. 13, 14 and 15. 
In this stage, the nucleolar substance, in most of the cases, 
is accumulated at the two ends of the chromatic figure, al- 
though a small quantity of the same substance is also visible 
surrounding each daughter chromosome (Figs. 14 and 15). 
Fig. 15 is asemi-diagrammatic drawing to show the real arrange- 
ment of the chromosome in this stage, while, in nature, the 
figure does not appear in such regular way, but always shows 
more or less modification. Not only so, but the considerable 
amounts of the nucleolar substance which thickly surround the 
chromatic figure tend to obscure the details of its arrangement. 
Fig. 13 is one of the best figures ever observed in the prepara- 
tion in such a stage. In Fig. 14, the chromatic rods are not 
shown entirely but only a part. The rest of the structures of 
the cell-body remain in the same condition in which they were 
during the last stages of the prophase. 
C. Germinal Cells in the Anaphase. The important 
changes in the chromatic figure in this phase are (1) the trans- 
verse splitting of the equatorial plate passing through the en- 
larged knobs which were primitively extremities of the dumb- 
bell ; and (2) the pulling up of the chromatin from the equator 
toward each pole asa result of the contraction of the ‘‘Halb- 
spindelfasern.”” A very important, as well as interesting point, 
is the transverse splitting of the entire chromatic figure along 
the equator. Each of the portions resulting from this division 
forms a continuous spireme. Although the mitotic figures pre- 
sented by the nerve cells show certain peculiarities in detail, 
still they agree exactly with the results obtained by previous 
investigators in that the chromosomes are divided into two ex- 
actly equal halves. 
Fig. 16 is a first stage in this phase, and shows the first 
formation of the central spindle. The central spindle is evi- 
dently formed from two different substances. One of these is 
the linin, which intimately ensheaths the chromosome and the 
other is the nucleolar substance. The nucleolar substance does 
Y. =" 
