372 
S. J. JOHNSTON. 
Genital pore on tlie ventral aspect, just beneath the oeso- 
phagus. Testes large, much branched bodies; copulatory 
organs moderately developed. Ovary oval, small; no Laurer’s 
canal nor receptaculum seminis. Uterus richly coiled 
in d o r s o - V e n t r a 1 loops, not passing outwards be- 
yond the intestinal limbs, and filling up all the space between 
the intestinal limbs from the gonads behind to the intestinal 
fork in front. Follicles of the yolk-glands minute (0’022 mm.), 
extending from the beginning of the intestine in front, form- 
ing a loop behiud the intestinal commissure behind. 
Eggs 0T07 by 0‘073 mm. (?) 
Host : The pied goose, A n s e r a n a s s e m i a 1 in a t u s , in the 
intestine. 
Type-specimen in the Museum of the Australian Institute 
of Tropical Medicine, Queensland, No. T. 34. 
Co-type specimen in the Australian Museum, No. W. 365. 
Five specimens were obtained from the intestine of the 
pied goose, A user anas semipalm at us, at Townsville. 
They are small leaf-like forms, oval iu shape, quite flat, 
and thin dorsoventrally, 4'3 mm. long by 1'83 mm. broad. 
The integument is quite smooth. 
The anterior sucker is so weakly developed as to be almost 
non-existent. It is represented by a funnel-shaped depression 
opening on the ventral surface near the anterior end; its 
walls are provided with a few weak muscle-fibres, which are 
more concentrated near its base. At the bottom it opens 
into a very well-developed and muscular pharynx, 0'228 mm. 
long by 0463 mm. broad. 
The oesophagus is short but distinct, and divides behind 
into the two intestinal limbs, which run backwards parallel to 
the edge of the body and fuse together so as to complete the 
ring at the posterior end. A few short cteca are given off on 
the inner aspect of each limb. 
Excretory System. — The excretory pore is on the 
dorsal surface, near the posterior end. It is surrounded by a 
distinct sphincter, and leads into a more or less spacious 
chamber situated wholly behind the intestine (fig. 5). Into 
