D. L. MacKinnon 
31 
possible to make out 1—3 dark granules lying on the anterior border of 
the cytostome. It is very difficult to be certain of the exact point of 
origin of the flagellum, which is exceedingly slender, and apt to become 
invisible on differentiation ; but it seems to arise from the most central 
of these granules. 
The cytoplasm is often highly vacuolated, and is crowded with masses 
of bacteria that have been ingested. 
Curiously enough, though the flagellate is sometimes pretty 
abundant, I have only once seen a living individual in process of 
longitudinal division, and I have searched my stained material for 
division stages in vain. Text-fig. 1 illustrates the dividing flagellate. 
The cytostome has become widely extended in a lateral direction, while 
Text-fig. 1. Drawing of living Emhadomonas agiiis, apparently in 
process of longitudinal division. 
the longitudinal split has already advanced about one-third along the 
body, starting from the posterior end. I could detect only one 
flagellum. While I watched, the split advanced a little, and the 
cytostome showed a tendency to divide in half. At this point, the 
organism’s movements, which had been getting slower and slower, ceased 
altogether, and it died without completing division. Emhadomonas is 
even more sensitive than Trichomastix, and seldom, survives removal 
from the host for more than an hour. 
I have never seen anything suggesting encystment in this organism. 
Systematic position. The name Emhadomonas — efj,/3d<i, a slipper— 
was suggested by the characteristic shape of the organism. Emhado¬ 
monas does not agree closely with any parasitic flagellate hitherto 
described, and, in the present unsatisfactory state of the classification. 
