176 
Trypanosome Diseases of Domestic Ammals um Uganda.* 
IV.—Trypanosoma uniforme, sp. nov. 
By Colonel Sir Davip Bruce, C.B., F.R.S., A.M.S.; Captains A. E. HAMErTon, 
D.S.O., and H. R. Bateman, R.A.M.C.; and Captain F. P. Macxig, IMS. 
(Sleeping Sickness Commission of the Royal Society, Uganda, 1908-10). 
(Received October 1,—Read December 8, 1910.) 
[PuatE 12.] 
INTRODUCTION. 
The name Z'rypanosoma uniforme has been given to this species on account 
of the uniformity in shape and general appearance which characterises it. 
Oniy four oxen were found by the Commission to show this trypanosome 
in their blood. One was received from Sir Apolo Kagwa, K.C.M.G., the 
Prime Minister, on August 30, 1909, and its blood at once inoculated into 
a series of animals. The other three came from the Uganda Company’s 
estate at Namukekera. 
The ox, goat, and sheep were found to be susceptible, while the monkey, 
dog, guinea-pig, rat, and mouse proved refractory. This was the case with 
Trypanosoma vivax, and in truth these two species resemble one another 
very closely. Trypanosoma uniforme differs from 7. vivax in size,and perhaps 
to a slight extent in shape; but, from the small amount of material at the 
disposal of the Commission, 1t would be rash to generalise. 
The few facts gathered will, therefore, be put on record, in order to 
draw the attention of future workers on Uganda trypanosomes to its 
presence. 
MorPHOLOGY OF TRYPANOSOMA UNIFORME. 
A. LInving, Unstained. 
This is a small and active trypanosome, which has a marked translatory 
movement in the field of the microscope. This movement, however, 
is not to be compared with that of 7. vivax in point of rapidity or 
range. The rapid vibratory movement of the body and flagellum some- 
times slows down for a perceptible fraction of time; but this trypanosome 
does not become completely quiescent as is commonly the case with 
T. pecorum. The cell-contents are clear and homogeneous, without any 
appearance of a vacuole. | 
B. Fixed and Starned. 
Length.—This trypanosome is smaller than 7. vivax. The average is 16:0 
as against. 23°7 microns. The following table gives the average length of 
* Continued from ‘Roy. Soc. Proc.,’ 1910, B, vol. 83, p. 27. 
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