152 
KEVOKT OF TRAVELLING PATHOLOGIST AND PKOTOZOOLOGIST 
Changes in 
the infected 
corpuscles 
Jiahesiii 
[PiropidSiJiutii) 
Piroplasm 
of the striped 
mouse 
Morphology 
of the parasite 
In some of the parasites a curious appearance is produced Ijy the occurrence of red staining 
patches arranged over the surface of the parasite (Plate XIV., fig. 13). It cannot he stated 
whether this has any connection with the parasite, or is only a change in the corpuscle brought 
about by its presence. 
In several instances it was noticed that the corpuscles containing the parasite were drawn 
out at each end, just as occurs in the case of the Lcucocytozooii of the guinea fowl (Plate XIV., 
tig. 21). Eeference is made to this condition and its significance in the section devoted 
to the consideration of the parasite of the guinea fowl. 
The uninfected corpuscles of the snake measure roughly 17 m by and these dimensions 
are considerably increased in the case of infected cells. The parasite tends to push the nucleus 
of the corpuscle to one side and also brings about some absorption of the haJinoglobin. 
Pigmented leucocytes (Plate XIV., fig. 9) are common in the blood. In sections of the liver 
and lung the capillaries are seen to be crowded with infected coi-puscles, the capillaries being 
clearly defined by the pigment containing parasites. The endothelial cells of the vessels also 
contain pigment granules evidently derived from the parasites. 
Clinging to the body of these snakes were ecto-parasites {Gamasidce). Examination of 
these revealed nothing which threw any light on the affinities of this parasite. 
For this parasite 1 suggest the name Hcemocijstidvum najtz, from its hosts, Naja vujricoll-is 
and Naja hajce. 
B .\ li E s I 
Babesia avicularis, n. sp. 
Host, Avicularis zebra. Locality, Bor, Jehel Eivei' 
Plate X., figs. 1-8 
In a zebra mouse {Avicularis zebra) taken at Bor on the Jehel River, was found an intra- 
corpuscular parasite of the genus Babesia {Piroplasma). A trypanosome (Plate X., fig. 9) was 
present at the same time. The zebra mouse thus infected was the first one examined, and 
though subsequently about two dozen others were captured and their blood submitted to 
examination, neither Babesia nor trypanosomes were met with again. As in other members 
of the genus Babesia, the parasite is found as a small unpigmented mass of protoplasm within 
the red corpuscles and having one or more granules of chromatin embedded in its substance. 
The parasite was only seen in the stained films. According to the appearances in these films 
the parasite exists in two forms, one of which is more compact and resembles the typical 
examples of Babesia canis or Babesia bigcininum, while the other is more irregular in shape, 
being evidently amujboid and resembling the irregular forms of the benign tertian variety of 
malaria. The two forms may be only the active and resting forms of the same stage of the 
parasite, or the irregular forms may be asexual stages, while the more compact forms arc 
gametocytes. 
The compact forms are shown in Plate X., figs. 2, 5, G, 7. At fig. 2 there are two 
parasites in one cell, and the appearance produced reminds one of the similar condition 
in the case of Babesia bigcminum and Babesia canis. The fonns depicted in figs. 5, 6, 7 
show a marked likeness to some of the ring forms of the malarial parasites. In each is a 
vacuole on the surface of which the chromatin is arranged either as a line (fig. 7) or as a dot 
(fig. 5). In fig. 8 is shown a form which may be intermediate between these compact forms 
and the amoeboid forms. A typical amoeboid form is shown in fig. 1 and again in fig. 3. 
These bear a striking resemblance to the amcehoid forms of the benign tertian malarial 
