56 THOMPSON YATES AND JOHNSTON LABORATORIES REPORT 
The width is great in proportion to the length of the body. The protoplasm has a 
very granular appearance. At one end is seen a highly refractile spot, at the other 
a fine, free flagellum. Both ends of the parasite are stumpy. 
In stained preparations, the parasite generally assumes an oval shape, due to 
its stumpy anterior and posterior ends and to its great width. The protoplasm takes 
on a deep blue reaction, is longitudinally striated, and is marked with one or two 
lighter patches in front of the macronucleus. The micronucleus is a large crimson 
spot. It is situated at the posterior end of the parasite and is in close relation to a 
clear space, a vacuole. The macronucleus is situated centrally and extends across the 
middle of the body. It stains a pink red colour, the chromatin being diffuse. The 
undulating membrane is a very narrow band extending on one side of the parasite 
from the micronucleus to the anterior end of the parasite's body. In Plate II, 
fig. 2, the undulating membrane has the appearance of crossing over the body ; this 
is due to the parasite being twisted on itself. The flagellum commences in the 
micronucleus, runs along the free border of the undulating membrane and ends as a 
fine free filament. Length of the parasite without free flagellum is 2i - 6 ft. Its 
width opposite macronucleus is 8 /*. The distance from micronucleus to centre of 
macronucleus is 9/6 fx. The length of the free portion of the flagellum is about 
10 /x to 12 fx. No divisional forms were seen. 
Two pigeons and two larks have been inoculated with these parasites, but have 
not yet shown organisms in their blood. The pigeons were inoculated three months 
ago. 
Dr. Hanna has very kindly shown us specimens of a trypanosome which he 
found in a pigeon in India, and we have also been able, through the kindness of 
Major Ross, to see one or two slides of blood taken from a blue jay in India, 
containing filariae and trypanosomes. 
These will shortly be described and illustrated by Dr. Hanna ; they present 
several morphological differences from the parasite we have seen in Africa. We feel 
certain that many more of these parasites will be found in birds and small animals 
both in India and Africa. 
Danilewsky* has described two varieties of trypanosomes — Trypanosoma major 
ami Trypanosoma avium — observed in the blood of birds. Unfortunately, we have 
not been able to obtain his original paper, and the reviews, which we have seen of his 
works, have not been sufficiently definite to enable us to determine whether our 
second avian trypanosome is the same as his or not. We have, therefore, left it 
unnamed for the present. 
Flagellata in the Blood of a Mouse 
At McCarthy Island, we obtained a few house mice and some field mice 
(Spec, unknown). 
* La parasitologic compare <iu sang. Nowvelles recherches sur les parasites du sans? ties oiseaux, 1889. 
