142 
KEFOKT OF TRAVELLING PATHOLOGIST AND PUOTOZOOLOGIST 
Trypanosome 
of the Monitor 
lizard 
T'rypanosome 
in a 
chameleon 
T*rv panosome 
of the black¬ 
necked 
spitting snake 
been determined. It is possible they I’epresent distinct species, or they may lie different 
stages of one species; intermediate forms were not seen. The large trypanosome resembles 
Trjjpmiosoma boueti described l.iy Martin from Mdbuia raddonii. In absence of evidence to 
the contrary it will be convenient to group both forms together as two types of one 
trypanosome, for which I propose the name Trypanosoma mabuice. 
Trypanosoma varani, n. sp. 
Host, Varanus nilotiaos. Varanus, sp. Locality, Tautikia, White Nile 
Plate XIII., figs. 11-13 
This trypanosome was encountered with a hasmogregarine in the blood of the Nile 
monitor {Varanus niloticus), and from the same locality in another species of Varanus which 
is to be found inland away from the river banks. 
In the fresh blood this trypanosome resembles Trypanosoma rotatorium of frogs. The 
general shape of the body is that of the letter U. The undulating membrane runs round the 
convexity of the bend. The movements are not very rapid, and consist mostly of a rotation 
with little progression across the microscopic field. 
The appearance in stained films is shown in Plate XIII., figs. 11-13. The body is broad, at 
its widest part measuring from 6-8p. The total length is from 35-40/i. The non-flagellar end 
is long and pointed and continued for about lop beyond the micronucleus. The nucleus is 
situated at the bend of the looped body. The undulating membrane is broad and wavy, and 
its margin is continued as a free flagellum for about 5-6p. The protoplasm stains deeply, 
showing various granules and vacuoles. Both in the living state and in the stained films 
the looped condition of the body is maintained, so this appears to be the permanent shape of 
the parasite. I propose the name Trypanosoma varani for this parasite. 
Trypanosoma cliamceleonis, n. sp. 
Host, Chamcelcon gracilis. Locality, Wau, Bahr-Ll-Ghazal Province 
Plate XIII., fig. 17 
This trypanosome, which resembles the foregoing in many respects, differs in several 
points. The movements in the fresh blood are similar, but the looping of the body is not so 
well marked. In the stained films only one good specimen was found, and this was too deeply 
stained. It is reproduced in Plate XIIL, fig. 17. It will be seen that the body is straighter than 
in Trypanosoma varani, and the non-flagellar end is less pointed. The position of the nucleus 
and micronucleus was obscured by the dense staining. The length of the body is about 40/i. 
For this species I propose the name Trypanosoma chamceleonis. 
Trypanosoma najee, n. sp. 
Host, Naja nigricollis. Locality, Eiver Sobat 
Plate XV., figs. 1 and 2 
This trypanosome was only met with in the fresh l)lood. prolonged search in stained 
films failed to reveal a single example. As seen in the wet films the parasite is shown at 
Plate XV., figs. 1 and 2. It will be noticed that the body is looped in a characteristic spiral 
manner. This form is retained" in all the movements of the parasite. In moving, the body 
rotates around the axis of the spiral. The non-flagellar end extends some distance 
