NOTES AND DESCRIPTIONS OF SOME PARASITIC HELMINTHS 463 
NEMATODA 
Murshidia species . ,; Loxodonta africana........ Semliki Valley, Belgian Congo. 
Cobboldina vivipara Leiper, 1911. Hippopotamus amphibius .. . Lake Edward, Belgian Congo. 
Setaria labiato-papillosa (Alessan- 
drini, 1838) Railliet and Henry, 
ON ak OM ste tees ee eg ee Bovalts cavers. ..> cris ss hs Ruindi Plains, Belgian Congo. 
Setaria poultoni Thwaite, 1928 .. Damaliscus corrigum jimela . Ruindi Plains, Belgian Congo. 
Setaria hornbyi Boulenger, 1921 . "CODUS CEO8S0). + is cawewean Ruindi Plains, Belgian Congo. 
Cylicospirura subaequalis Molin, 
ll o\8) | A Se fon eee ama ee PUOLROO ek aa. GN a ar Ba ee Ruchuru Plains. 
Ophidascaris jilaria (Dujardin, 
1820) Baylis, VOR: oo cte sss Pullton: SOSCies. . so sas4 nee Ruchuru Plains. 
Streptopharagus pigmentatus 
(Linst., 1897) Railliet and 
Blane OVS. A oc odsaaak deur *Cercopithecus diana ....... Liberia. 
Trichuris trichiura ee 
1771) Stiles, 1901. Pes es *Cercopithecus diana ....... Liberia. 
Enterobius species . *Cercopithecus diana ....... Liberia. 
Strongyluris brevicaudata Miller, 
Pee Gh on th Mie 9 ale bik os Le Agama colonorum......... Liberia. 
Saurositus agamae Macfie, 1924 . Agama colonorum......... Liberia. 
TREMATODA 
Family DICROCOELIDAE 
The material collected from the liver of a species of Colobus monkey shot in 
the Ituri Forest, south of Lake Albert, Belgian Congo, consisted of some fifteen 
small trematodes, which had been fixed in Zenker’s solution. Of this number 
only three or four are not contracted and generally distorted to the extent that 
the structure of the parasites cannot be profitably studied. The measurements 
given in the following description were taken from the most favorable specimens 
available mounted in gum damar after staining in carmine. 
DICROCOELIUM COLOBUSICOLA, new species 
Specific diagnosis. Dicrocoeum: Length 3.6 mm. to 5.2mm. The greatest 
width in the largest specimen is 1.9 mm. at a post-equatorial point level with the 
posterior border of the yolk glands. The body is thin and flat with weakly- 
developed musculature. The specimen least contracted, and hence chosen to 
represent the type, is spindle-shaped, the body tapering gradually to a rounded 
extremity anteriorly. In other specimens the preacetabular region is drawn out 
into a rather narrow neck. The superficial cuticle is devoid of scales, but the 
presence of numerous subcuticular cells gives it a granular appearance which 
to some extent masks the internal structure so that the more delicate details are 
difficult to determine. Oral sucker circular in outline, from 0.22 mm. to 0.28 mm. 
in diameter. It is terminal and ventral, with strong muscular rim nearly 90u 
wide. The oral aperture is subterminal and semilunar in shape. Muscular 
pharynx, 0.08 to 0.12 mm. in length, followed by a narrow oesophageal region, 
about 0.15 mm. long, which bifurcates to form the intestinal caeca. Intes- 
tinal caeca simple, thin-walled, and so narrow that in some specimens their pres- 
ence is determined with difficulty. In other specimens the caeca are about 
