496 REPORT OF THE HARVARD AFRICAN EXPEDITION 
forms were still motile fourteen hours after death and were of the usual vermicu- 
lar form. The intracorpuscular forms were rather short, never U-shaped and 
resemble very much the Haemogregarines of the alligator, A. mississipprensis 
as figured by Wenyon.! They often displaced the nucleus of the red blood cor- 
puscle toward one pole. Smears and sections of the internal organs were normal. 
Haemogregarines of Snakes 
Haemogregarines were seen in the blood of three specimens of Dendraspis 
viridis, as well as in several unidentified snakes. 
The organisms as seen in the blood of Dendraspis viridis were of the usual 
haemogregarine form, viz., large, sausage-shaped intracorpuscular organisms. 
Smears and sections of the lung and liver showed no developmental forms. 
Grahamella 
Typical Grahamella were found in one rat, Praomys tullbergi, and in one bat, 
Petalia grandis. The infection in the rat was fairly intense, almost every micro- 
scopical field showing a parasitized red blood cell. Some of the cells were almost 
completely filled with these organisms whereas others had only a few. 
The infection in the bat was very slight, only a few cells in a smear were found 
infected. The blood of this bat also showed an intense infection with plasmodia 
and a mild infection of trypanosomes. 
Balantidium of the Monkey Cercocebus torquatus 
A species of Balantidium morphologically indistinguishable from Balantidium 
coli was found in a monkey (Cercocebus torquatus). ‘Two other specimens of this 
monkey examined were negative for this ciliate. During life numerous cysts were 
passed by the infected animal in its faeces. 
At autopsy these ciliates were found in enormous numbers in the large bowel. 
They were extremely numerous in the caecum. ‘The lower end of the small 
intestine contained a few. These organisms were particularly abundant in ma- 
terial scraped from the surface of the bowel. ‘There were relatively few in the 
intestinal contents. ‘The cysts were numerous in the distal end of the large bowel, 
very few being seen in the upper end. 
In addition to Balantidium, numerous Hntamoeba, a blastocystic-like organ- 
ism and.enormous numbers of spirochaetes were present. The entamoebic cysts 
were of two types. One was large and contained eight nuclei, resembling a 
large Entamoeba coli cyst. The other type was small and contained four nuclei 
suggesting a small H. histolytica cyst. There was no ulceration visible to the 
naked eye. 
Microscopical examination of sections of the large bowel showed no ulcera- 
tion. The balantidia were present in large numbers closely applied to the sur- 
face of the mucous membrane, forming continuous layers in places. Numerous 
ciliates were seen in the glands of the large intestine. Sometimes as many as 
1 Wenyon, C. M.: “Protozoology”’ (1906), vol. II, Plate XIX, p. 1102. 
