J. A. Innes 
221 
Another feature in this species is the position of these organs, which 
are situated centrally between the two testes, and between the atrium 
and posterior sucker. The uterus is much convoluted but it is not 
“clumped” (geknault). It was filled in parts with ova measuring about 
110 X 60 fi. In certain regions the uterus seemed to be surrounded by 
a thick syncitium. The vagina opens anteriorly at the genital aperture. 
The excretory vesicle of this species is unique both in position and 
outline. It is situated immediately in front of the posterior sucker and 
behind the shell gland, while in the other species it has a more or less 
Fig. 7. Diagram showing relation of the genitalia in G. buhalis. Position of testes 
shown by dotted lines. At. atrium. Ov. ovary. Sh.gl. shell gland. Y.gl. yolk 
gland. C/t. uterus. L.C. Laurer’s canal. iSx. Fes. excretory vesicle. Fa;. Fc. canal 
of excretory vesicle. P.S. posterior sucker. 
lateral position. The great irregularity of its outline is also striking. 
The canal of the excretory vesicle is short and does not unite with 
Laurer’s canal as in G. wenyoni (Leiper, 1908) but opens separately 
below it (Fig. 7, Ex. Vc.). 
The musculature of the parasite seems to be concentrated in the 
suctorial regions at either extremity and there seems to be as much 
muscular tissue at the posterior end as there is in the rest of the body. 
Thin bands of muscle fibi’es run longitudinally, but there are few circular 
muscles in the middle of the body. The yolk follicles are united into 
small groups and form a kind of plexus. They are irregularly scattered 
throughout the body, being placed both dorsoventrally and dorsolaterally 
(Fig. G, Y.F.). Like G. compressus, the general tissue of the animal is 
very loose, parenchymatous and spongy. 
The parasite is believed to occasion no inconvenience to its host. 
