76 
C. H. MARTIN AND MURIEL ROBERTSON. 
monas gallinarum. The axostyle is apparently unchanged, 
but the chromatic grannies are scattered irregularly through 
the cytoplasm at the anterior end of the animal. The nucleus 
has become quite round aud the chromatin is now distributed 
between the nuclear membrane and the karyosome-like body 
lying in the centre of the nucleus. 
We have, unfortunately, no stage showing the behaviour of 
the nucleus at the moment of division, since in the next stage 
which we figure (PI. 13, fig. 58) the nucleus has already 
divided. The two new blepharoplasts with their attached 
flagella now lie at opposite sides of the animal’s body, which 
lias become more rounded. The band joining the blepharo- 
plasts is already showing signs of disappearance, but that 
this may persist till a much later stage is shown in figs. 59 
and 60. The two new nuclei resemble very closely the 
nucleus of the preceding fig. 57, since in both cases the 
chromatin is divided in a characteristic way between the 
nuclear wall and the internal mass. Here, again, in the case 
of Trichomastix gallinarum, as in the preceding case of 
Trichomonas gallinarum, we have no definite evidence 
as to the behaviour of the axostyle during division, but we 
believe that here also we have a process of solution of the 
old axostyle and the formation of two new ones. 
The chromatin blocks in this specimen are still rather 
irregularly scattered through the cytoplasm. They seem to 
show some tendency towards their formation into two more 
or less parallel longitudinal series. In the succeeding stage, 
shown in fig. 59, the body of the animal is more rounded, 
and a new short flagellum is growing out from the blepharo- 
plast in each individual. Each individual possesses a short, 
fine chromatic line and an axost}de, and the chromatin blocks 
in each case are showing a tendency to resume the arrange- 
ment characteristic of the original active individual. 
In the next stage (fig. 60) division has proceeded much 
further as regards the cytoplasm, but the nucleus is in a con- 
dition which we must regard as intermediate between the 
round form with the chromatin divided between the nuclear 
