36 
Treniatodes of North Queensland 
anomalies that it cannot be considered by any means a typical member 
of the family. The presence of the long tube-hke genital sinus is a 
peculiarly Hemiurid characteristic, but the structure of the remainder 
of the male end-apparatus is decidedly unusual. Hitherto the only 
Hemiurid in which the pars prostatica has been found enclosed in 
a cirrus-pouch is Hemipera ovocaudata Nicoll, 1913. In that species 
the vesicula seminalis is entirely outside the pouch. The relative 
position of the ovary and testes is the reverse of that usually met with 
in the family, though it occurs in Liocerea Looss, 1902, and Hemipera. 
Finally the arrangement of the yolk glands is quite foreign to the family. 
Genus Opistholebes n. g. 
Opistholebes amplicoelus n. sp. 
(Plate V, fig. 9.) 
Two specimens of this interesting parasite were taken from the 
intestine of a green toad-fish {Sphaeroides lunaris). Both specimens 
were shghtly pressed before being examined, so that the following 
measurements are somewhat greater than in a normal specimen. 
The outhne is oval but the anterior end is more pointed than the 
posterior end. The latter is rounded but has a distinctly projecting 
tip. There are no cuticular spines. 
The length of the larger specimen is 2 mm. and the maximum 
breadth is T3 mm. The oral sucker, which is globular and sub-terminal, 
has a diameter of 0-28 mm. The ventral sucker is situated sub- 
terminally at the extreme posterior end of the body and measures 
0-34 mm. in diameter. 
There is a short, wide prepharynx, 0-04 mm. in length, the com¬ 
paratively large pharynx measuring 0-17 x 0-22 mm. There is no 
oesophagus; the intestinal diverticula diverge immediately from the 
pharynx. The diverticula are exceptionally wide, each occupying 
at least a quarter of the breadth of the body. They extend to the 
posterior end of the body, their termination being on the level of the 
aperture of the ventral sucker. 
The genital aperture is situated 0-24 mm. behind the pharynx, and 
is displaced somewhat to the left. The cirrus-pouch is long and 
slender, stretching obliquely across the body. Its dimensions are 
0-45 X 0-125 mm. It consists of an inflated proximal part and a very 
attenuated distal part. The inflated portion contains the highly con¬ 
voluted vesicula seminalis, while the attenuated portion is traversed 
