492 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Plasmodium of Cercopithecus nictitans 
Several specimens of this monkey were examined for blood parasites. In 
only one, however, was a plasmodial parasite observed. The blood of this 
animal was examined shortly after death, both in stained and unstained prepa- 
rations. Exflagellation was observed. The dried blood smears after staining 
with Giemsa showed a fairly heavy infection with a species of malarial para- 
site. The large majority of organisms present were ring forms of various sizes. 
Fairly frequently two dots of chromatin were present. More often the chro- 
matin was in the form of a rod (No. 400, Fig. 5) while sometimes it was U-shaped 
(Fig. 6). The pigment was bright yellow and in very small particles, usually 
equally distributed throughout the parasite, but sometimes collected into one or 
two areas. The parasitized cell was not enlarged, nor were there any changes in 
the host-cell resembling Schiiffner’s or Maurer’s dots. The gametocytes com- 
pletely filled the red blood cells and the two types were easily distinguishable. 
The female gametocyte takes on a deep stain and has a dense and compact 
nucleus. The microgametocyte stains less densely, in fact often is yellow on 
account of the large quantity of finely divided pigment, and has a large and 
diffuse nucleus. Should further study of the malarial organisms of monkeys 
show that this is a distinct species, we suggest the name Plasmodium cerco- 
pitheci n. sp. 
PLASMODIUM OF A BAT 
Although numerous specimens of several species of bats were examined for 
malarial parasites, in only one was an infection seen. In the blood of this bat 
(Petalia grandis) there was also a sparse infection of trypanosomes and of 
Grahamella. The malarial organisms were fairly abundant. Ring forms, de- 
veloping schizonts and gametocytes were seen. No segmenting forms were 
found. The organism is very actively motile, sending out pseudopodia, so that 
the parasite was usually very irregular in form, and typical ring forms were 
searce (No. 400, Figs. 14-20). The infected red blood cell was usually en- 
larged. Fig. 18 represents a normal red blood cell beside an infected cell for 
comparison. The staining reaction of the parasitized cells was normal. Chro- 
matin was abundant and very irregular in shape, except in the gametocytes 
where it took on around, compact form. Pigment was abundant, dark brown 
in color and sometimes almost black and in the form of large round or rod- 
shaped particles, particularly in the sexual forms. Gametocytes were fairly 
abundant and the two types easily distinguishable (No. 400, Figs. 19-20). 
Plasmodia of African bats have been described by several authors. Thus 
Dutton, Todd, and Tobey ' found forms resembling P. murinum in unidenti- 
fied bats in the Congo. A species of Plasmodium was described by Rodhain 2 
in the flying fox Kpomophorus franqueti from the Ouelle district of the Belgian 
Congo. ‘The only record we can find of a malarial infection in a bat on the 
1 Dutton, J. E., Todd, J. L., and Tobey, E. N.: Liverpool School Trop. Med., Mem. XXI (1906), 
p. 85. 
2 Rodhain, J.: Bull. Soc. Path. Exot. (1915), VIII, 726. 
