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C. H. MARTIN. 
Trichomastix than of a true Trypanoplasma. As the 
animal passes forward its anterior end rotates in a small 
circle from right to left, like the hands of a watch. The 
number of anterior flagella can best be seen in forms 
which are anchored by their posterior end ; the flagella 
then strike upwards individually and swing back together. 
As regards the distribution of the parasites in the gut, it is 
interesting to note that in the cases I have examined the 
stomach was heavily infected as low down as the Pylorus. 
Below this no trace of Trypanoplasmoides could be found. 
The next portion of the gut, viz. the pyloric caeca and the 
commencement of the intestine, were, in the case of the fishes 
I examined, free from all flagellates. The rectum was in most 
cases seen to be heavily infected with an Octomitus and the 
interesting ciliate Opalina saturnalis, which has been 
described by Leger and Duboscq. 
In the stained forms the flagella seem to take their origin 
from a small basal granule lying in front of the darkly 
staining mass of the kinetouucleus. The kinetonucleus is 
very variable in shape ; generally it is more or less sausage 
shaped, but it is often drawn out in the middle, so that it may 
appear as if divided into two or more blocks. Such appear- 
ances of the kinetonucleus have often been figured as evidence 
of division in this and similar forms, but I think it will be clear 
from the description of the division given below that they have 
really nothing to do with this process. (PI. 9, figs. 14, 15). 
The trophonucleus is generally rather small and spherical, 
and contains a fairly large karyosome. Some granules of 
chromatin are usually found on the membrane of the nucleus. 
Trypanoplasmoides seem to have a very large range of 
variation in size, and it is curious to note that the forms 
undergoing division are generally found amongst either the 
smaller or the medium sized animals. 
The details of the division of Trypanoplasmoides are 
rather difficult to make out, particularly as regards the 
behaviour of the ffagella. In the early stages of division the 
blepharoplast divides, and at the same time the undulating 
