W. Nicoll 
241 
The two moderately large globular testes lie in the posterior half of 
the body, one in front of the other and contiguous. The posterior testis 
is separated from the end of the body by a space equal to its diameter 
which is 045 mm. The cirrus pouch is small and stout, lying immediately 
and entirely in front of the ventral sucker. It contains a comparatively 
large and globular vesicula seminalis but other details of its internal 
structure were obscured by the presence of eggs in the genital sinus. 
The genital aperture is in the middle line a little in front of the 
intestinal bifurcation. 
The ovary is situated just in front of, and contiguous with, the 
anterior testis, but displaced towards the right side. It is transversely 
oval and measures about 0'37 x 0'26 mm. The yolk glands are very 
voluminous filling up the greater part of the posterior half of the body 
and extending along each side to the level of the middle of the 
pharynx. The follicles are somewhat small and are arranged in a 
peripheral layer, which in front of the ventral sucker extends right 
across the body dorsally but only for a short distance venti’ally. At the 
level of the ova.ry the ventral layer begins to extend in towards the 
middle line overlapping the edges of the ovary and anterior testis and 
almost completely covering the posterior testis. Behind the latter the 
follicles from each side merge and completely fill the post-testicular 
space. There is no receptaculum seminis but the initial two or three 
convolutions of the uterus are packed with sperm. No Laurer’s canal 
was observed. The uterus fills up the region between the ovary and 
the ventral sucker, and is confined within the space bounded by the 
intestinal diverticula. The eggs do not exceed 100 in number. They 
are brownish yellow and of moderate size, measuring 0'078-0’084 x0‘046- 
0’050 mm. 
The systematic position of this species is a matter of some difficulty. 
It is obviously related to the groups of which Lepocreadiuin and 
Stephanochasmus are the chief representatives, but it presents such a 
combination of the characters of the two groups that it is difficult to 
decide to which it is more nearly related. Thus, for instance, it has 
the reduced ventral sucker of the Lepocreadiinae but, on the other 
hand, it lacks the vesicula seminalis externa and the receptaculum 
seminis of this group. Again it has the uterine receptaculum seminis 
and the large pharynx characteristic of the Stephanochasminae but it 
lacks the crown of cephalic spines. For the present it must be regarded 
as an intermediate type. It does not appear to be closely allied to any 
other known form. Its generic characters may be summarized as follows ; 
