108 
Queensland Trematodes 
approaches that found in Clonorchis. The ovary is also of an unusually 
irregular outline. The ventral sucker is larger than in most other species 
while the yolk glands are more continuous. 
The genus Orchipedum occupies at present an ill-defined systematic 
position. Braun (1902) regarded it as a possible member of the Psilo- 
stomidae, but this view is not endorsed by Odhner (1913, p. 304) who 
considers the genus to be more closely allied to Paragonimus. The 
anatomy of the species I am about to describe supports his conclusions 
so far as they go, but at the same time it can hardly fail to be apparent 
that the relationship between these two genera is not of a very intimate 
character. 
* 
Orchipedum sufflavum n. sp. 
(Plate VI, figs. 2, 3, and Plate VII, fig. 13.) 
Two specimens of this interesting parasite were met with in the 
oesophagus of a black spoon-bill (Platalea regia). It is a large brightly 
coloured species, the ground colour being light yellow and the margins 
dark brown. In addition the compact mass of eggs forms a large 
reddish-yellow spot in the anterior part of the body. 
The outline is somewhat lozenge-shaped, the greatest breadth 
occurring at the anterior third of the body, a little behind the ventral 
sucker. From there the body tapers rapidly towards the anterior end. 
Both ends are pointed. The edges of the body are very thin and are 
thrown into irregular wrinkles. There are no cuticular spines. 
The length is 11’3 mm. and the maximum breadth 2‘8 mm. The 
oral sucker is globular, with a diameter of 09 mm. The shallow ventral 
sucker is somewhat oval and measures 1‘37 x P61 mm. It is situated 
2'5 mm. from the anterior end. 
The pharynx is contiguous with the oral sucker and there is practi¬ 
cally no oesophagus. The intestinal diverticula extend almost to the 
posterior end of the body and are rather inflated and irregular. 
The excretory vesicle is Y-shaped, the bifurcation taking place a 
short distance behind the level of the ovary. 
The genital aperture is median and almost midway between the two 
suckers. There is no true cirrus-pouch but the vesicula seminalis is 
of comparatively large size and extends back to beyond the middle 
of the ventral sucker. It is slender and highly convoluted. The pars 
prostatica is somewhat elongated and is surrounded by a very large 
number of prostatic cells, forming an almost globular body. It is not 
