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Queensland Trematodes 
Family ECHINOSTOMIDAE. 
Sub-family Echinostominae. 
Genus Echinostoma Rud. 
Eehinostoma elongatum n. sp. 
(Plate XXIII, fig. 1.) 
A few specimens of this parasite were collected by Dr Nisbet, 
Townsville, from the intestine of a night-jar (Podargus strigoldest). 
They are of moderate size, 6-9'5 mm. in length with a maximum 
breadth of 0'7-0’8 mm., the broadest part of the body being across the 
testes. The breadth is fairly uniform, the sides of the body being 
almost parallel for a considerable part of their length. The breadth of 
the head is 0'5-0'6 mm. The body is fairly flat and is covered in front 
of the ventral sucker with numerous cuticular spines. 
There are 35 cephalic spines arranged in two unbroken rows and 
with end groups of four on each side. In one specimen only 33 spines 
could be made out. The spines vary considerably in length, the limits 
being 0 06 mm. and 0'095 mm. and the average about 0 08 mm. As a 
rule the spines in the end group are rather longer than the others, but 
no constant difference could be detected. 
The oral sucker is very small, measuring only 0T1-0T5 mm. in 
diameter. The ventral sucker, which is situated at a distance of 
T1-T5 mm. from the anterior end, measures 0'35-0‘5 mm. in diameter 
and 0'55-0 65 mm. in depth. It is oval in outline. 
The prepharynx is about 0'08 mm. long and the pharynx measures 
0T2 x 0T mm. The oesophagus is 0 3 mm. long. The intestinal 
diverticula extend to the posterior end of the body. 
The genital aperture is over the intestinal bifurcation and the 
cirrus-pouch is short and plump, not extending beyond the middle of 
the ventral sucker. It measures about 0‘5 x 0 - 2 mm. and contains a 
large vesicula seminalis, a small pars prostatica and a long ductus and 
cirrus. The testes lie in the posterior half of the body, the post-testi- 
cular space being about T4 mm. or rather more than a sixth of the 
body-length. They lie directly tandem and are separated by a space of 
about 0 2 mm. They measure on an average TO x 0‘46 mm. but the 
posterior is usually a trifle larger than the anterior testis. 
The smaller globular ovary lies 03 mm. in front of the anterior 
testis and has a diameter of 0'22 mm. Behind it lies the shell-gland 
complex and the receptaculum seminis. The yolk glands occupy the 
