150 
KEl’OKT OF TKAVELLINU PATHOLOGIST AND I’KOTOZOOLOGIST 
Htillt'ridhtDi 
Ill various 
species of 
birds 
HtEmoLysli- 
diitm 
In the spitting 
snakes of 
the Sobat 
multiplication takes place in the internal organs, perhaps after the manner of the asexual 
multiplication of Ralteridimn recently described by Aragao. This is the first time, as far as 1 
am aware, that such a parasite has been noted from a cold-blooded host. The parasite differs 
markedly from the Ihemocystidium descrilied by Simond in the blood of the fresh-water 
tortoise in India and by Castellani and Willey in Ilemidactylus leschenaultii, from the same 
country. It differs also from the similar parasite described by Laveran from Testudo pardaiis 
of South Africa. The affinities of this parasite are evidently with those of Ualteridmm, 
from which it differs, however, in the shape of the gametocytes and, perhaps, in the fineness 
of the pigment grains. This latter feature, however, is very variable in different species of 
Haltcridiuiu. I suggest for this parasite the name Hcemopruteus aganue, from its host Againa 
colonoriim. 
H A L T E E I D l U JI 
Plate XIII., figs. 14-16, 18-22 
Halteridium {Ilamoproteus daiiilnvshi) was met with in a number of birds. The 
parasites differ according to the host, and probably do not all belong to one species. In the 
Jabira crane {Epippiorhijnchtis senegalemis) a large variety was encountered. This is figured 
in Plate XIII., figs. 14-16. The gametocytes fill the cell, either by completely surrounding the 
nucleus (fig. 16), or by displacing the nucleus to the side of the corpuscle (tig. 15). The female 
gametocyte is shown in fig. 16, the male in figs. 14, 15. Flagellation occurred very readily. 
The male gametocytes have coarse pigment, while the female have fine pigment. It will be 
readily seen that this species differs from the type figured at Plate XIII., figs. 21, 22, which is 
the form usually met with in birds. This species, or species not readily separated from one 
another, occurs in the common sparrow' of the Sudan {Hypanthoriiis taiiiopterus), in the guinea 
fowl (Numidap)tilorhyncha), in the northern crowmed crane {Balcarica cecilicB), in the white-faced 
owd, the Marabou stork,and other birds. A curious appearance (Plate XIII., figs. 18-20) was noted 
in the case of the Halteridium of a sparrow. One end of the parasite was drawn out into a fine 
process which reminded one of a flagtdlum. This W'as, however, more a fine pseudopodium than 
a flagellum, as the staining characteristic of a flagellum w'as not present. Possibly it is produced 
in the process of development which takes place when the blood is removed from the host, and 
is brought about by the contraction of the gametocyte to a spherical form. It was only found 
in the case of the female gametocytes. These resemble some of the figures given by Schaudiun 
of the development of the trypanosome into the Ualteridmm, but there is nothing to show’ that 
there is anything more than a slight superficial resemblance between such forms and true 
trypanosomes. 
H Ji SI 0 C Y S T I D 1 U M 
Ilceruocystidium najm, n. sp. 
Hosts, Naja hajm, Naja nigricollis. Locality, Eiver Sobat 
Plate XIV., figs. 1-17, 21; Plate XV., tigs. 4, 5, 6 
This parasite was encountered in the blood of two cobras taken on the Sobat. One snake, 
Naja haj<c, w'as captured at the American Mission Station at Deleih Hill, the other, Naja, 
nigricollis,'At Nasser, further up that river. In both these snakes the same parasite occurred, 
the infection being an exceedingly large one, about one corpuscle in every six containing 
parasites. In the case of Naja nigricollis a trypanosome (Plate XV., figs. 1, 2) occurred at the 
same time, while in both, a haimogregarine (Plate XV., tigs. 3, 4, 8) was also present. 
In the fresh blood the parasite was seen in the corpuscles as large 'whitish areas dotted 
over with coarse pigment granules. The living parasites are figured on Plate XV., figs. 4, 5, 6. 
