Kasongo. 
Three antelopes (adult males, Tragelaphus scriplus). 
1. Shot four hours previously, no trypanosomes in gland juice or 
blood. Prescapular gland 6 by 3 cm., iliac glands haemorrhagic 
2. Shot three hours previously. Trypanosoma theileri in blood. 
Inoculated rabbit and two guinea-pigs with blood; none became 
infected with any trypanosome. 
3. Shot three hours previously ; no trypanosomes in gland juice, 
many in blood. Abdominal glands much congested and enlarged. 
Inoculated prom Antelo-pe No. 3. —Guinea-pig (Exp. 188). Inoculated January 
28, 1905, with 1-5 c.cm. of blood showing three trypanosomes to field; not infected. 
April 19, re-inoculated with 2 c.cm. mixed citrate solution and blood from Exp. 189 
showing one trypanosome to field ; June 19 infected ; trypanosomes were constantly 
present until animal’s death from pneumonia on August 30, 1905. Spleen 
3 x i'Sx '75 cm. normal ; glands congested, not much enlarged. 
Guinea-pig (Exp. 189). Inoculated with 2-5 c.cm. of blood as in Exp. 188; 
infected February 6, parasites constantly present in large numbers until death from 
pneumonia, August 30, 1905. Spleen large (6 x 3 x **5 cm.), soft, friable, congested; 
glands enlarged and congested. No trypanosomes were seen in blood just before 
death or in organ juices ; present in gland juice. 
Rat (Exp. 190). Inoculated with 2-5 c.cm. blood as in Exp. 188; not infected. 
April 19, re-inoculated with 2-5 c.cm. mixture as in Exp. 188; April 25, trypano¬ 
somes present, but were not again seen. Animal escaped June 19, 1905. 
Rat (Exp. 191). Inoculated and re-inoculated (April 19) as in Exp. 190; infected 
May 1. Parasites constantly present until it died of pneumonia September 19, 1905- 
Young guinea-pig (Exp. 230). Inoculated April 19, 1905, with 2 c.cm. blood 
from Exp. 189 ; infected May 6. Many parasites constantly present until death 
from the disease, July 6, 1905. 
On the journey from Kasongo to Lusambo the blood of the 
following animals was examined by cover-slip preparations: four 
Tragelaphus scriplus , one Can is anthus , six Hippotragus equinus, 
one Bos nanus (ten antelopes, a jackal and a buffalo). Trypanosomes 
were seen in none of them. 
V. MORPHOLOGY OF THE TRYPANOSOMES 
(a) Trypanosomes of cattle 
The trypanosomes seen in stained preparations of blood from the 
cattle, horses, antelopes and their sub-inoculations, are so nearly 
identical that one description will suffice. Slight variations and 
peculiarities will be mentioned separately. 
1 hree types of trypanosomes were found corresponding closely to 
the description of T rypanosoma dintorphon as given by Dutton and 
