W. Nicoll 
345 
Family CEPHALOGONIMIDAE. 
Genus Prostliogonimus Luhe. 
Prosthogonimus vitellatus n. sp. 
(Plate XXIV, fig. 8.) 
Two specimens of this species were obtained from the bursa fabricii 
of a drongo (Dicrura bracteata). Unfortunately both were damaged in 
collecting, but one was in a sufficiently good state to permit of a fairly 
accurate description. It is a moderately large form measuring 5 mm. 
in length and 2'6 mm. in maximum breadth. The body is roughly oval 
in outline but there is a slight constriction just in front of the ventral 
sucker and from there the neck narrows very rapidly to the pointed 
anterior end. The posterior end of the body is rounded. The cuticle 
is covered with stout spines in the anterior half of the body and these 
are present both on the ventral and dorsal surfaces. The oral sucker is 
elongated and measures 0‘53 x 0‘33 mm. The ventral sucker is almost 
globular, measuring 0'66 x 0'7l mm. It is situated at a distance of 
T58 mm. from the anterior end of the body, so that the neck is almost a 
third of the body-length. Contiguous with the oral sucker is a large 
pharynx, measuring 0'2 x 0T8 mm. The oesophagus is about the same 
length (0'21 mm.) and the wide intestinal diverticula extend to within 
08 mm. of the posterior end of the body (twice the length of the testes 
behind the posterior border of the testes). Behind the testes the 
diverticula gradually bend in towards the median line, and their ends 
are somewhat inflated. 
The genital aperture is situated to the left of the mouth, near the 
margin of the body. The cirrus-pouch is a long sinuous structure 
extending backward to a little behind the intestinal bifurcation. The 
two large testes lie almost immediately behind the ventral sucker, and 
are bounded on their outer side by the intestinal diverticula. They 
are separated from each other by a space of 0’46 mm. They are sym¬ 
metrically situated, elongated oval in outline and measure about 0‘73 x 
0 - 53 mm. They are overlapped to some extent by the uterus. 
The ovary lies dorsal to the posterior half of the ventral sucker and 
somewhat to the right side. It is a large, deeply-lobed body measuring 
0‘72 mm. in greatest diameter (transverse). Close to its left side lies a 
fairly large shell-gland. The yolk glands lie mainly to the outer side 
of the intestinal diverticula but a certain number of follicles are found 
on the inner side, especially anteriorly. In this respect the specimen 
