418 REPORT OF THE HARVARD AFRICAN EXPEDITION 
disease. A fair number of degenerating malarial parasites and considerable 
malarial pigment were also observed in endothelial leucocytes. The trematodes 
themselves in the liver were turned over to Dr. Sandground, the helminthologist 
of the department, who after studying the parasite reports that it is a new species 
of trematode which he has described under the name of Dicrocoelium colobusicola 
(page 463). Sandground points out that this species is a typical member of the 

No. 352. — Drawing of section of liver of monkey. Dicrocoelium colobusicola infection, 
illustrating early inflammatory lesion of the liver. Zeiss objective DD, ocular 10x 
genus Dicrocoelium, Dujardin, 1845. The species of this genus are numerous 
and have been found distributed in mammals, birds, and reptiles, usually within 
the liver and bile ducts. 
Stiles, in his Key Catalogue, lists Dicrocoelium lanceatum and of D. dendriti- 
cum as infecting man. With reference to Dicrocoelium lanceatum he! states that 
while the parasite is quite common in cattle and sheep, only about seven cases 
of its occurrence in man have been reported. Since this time, however, additional 
eases have been reported by Pigoulewsky.? Nevertheless, it is doubtless purely 
an incidental parasite for man and as only light infections are likely to occur it is 
probably not a serious human parasite. 
1 Stiles: “Osler’s Modern Medicine” (1925), II, 516. 
2 Pigoulewsky: Trop. Dis. Bull. (1928), XXV, 455. 
