
JOHNSTON AND EDMONDS—AUSTRALIAN ACANTHOCEPHALA 561 
can be made out in a few of the worms. Two well developed lateral uterine 
pouches, in most eases containing eggs, come off laterally from the anterior end 
of the female eomplex and project towards the anterior end of the worm. The 
uterus is short and stout, its maximuin dimensions being, length 0-92 mm. and 
breadth 0-45 mm. The female aperture is ferminal. Ripe eggs are from 88 to 95p 
long and from 40 to 48, wide and are without polar prolongations (fig. 21). 
Systematic Position. This parasite is considered to be a riew species of the 
genus Hmpodius, family Gigantorhynchidae. It shows many resemblances to 
E. taeniatus (von Linstow 1901), but differs from the latter in length, in the 
number and arrangement of the proboscis hooks, and in the size of the egg. 
ProstHORHYNCGHUS CHARADRT Yamaguti 1939. 
Fig. 25-30. 
A number of male and females of an echinorhyneh, which we consider to be 
juvenile specimens of the above species, were found in the intestine of the bird, 
Charadrius cucullalus, collected by Prof. -. B. Cleland at Waitpinga, South 
Australia, The animals are small and cylindrical and the larger females in most 
eases are curved ventrally towards the posterior extremity. The body of both 
sexes is devoid of spines. The length of the males ranges from 1:5 to $°2 mm,, and 
the maximum width 0°50 to 0-66 mm, The length of the females ranges from 
28 to 5-4 mm, and the width from 0°58 to 0-80 mm., alll these measurements 
being made on specimens cleared in methyl salicylate. The proboscis, which is 
invaginated in all our specimens, is cylindrical and is borne at a slight angle 
to the rest of the body. Tts maximum width ranges from 0-14 to 0-19 mm, and 
when fully everted, would be about 0-4 to 0-8 mm. long. The proboscis is armed 
with 17 longitudinal rows each of about 17 hooks, all of which, exeept the posterior 
three, have strong rooting processes. Their shape and size is shown in fig. 28. 
There is a short neck without hooks. The proboscis sheath is cylindrical and 
measures from 0-6 to 1+2 mm. in length and from 0-15 to 0:21 mm. in width, 
The sheath is double-walled and an elliptical brain is situated near its middle. 
There are two slender lemnisei which in most cases extend as far as the posterior 
end of the proboscis sheath. 
Male System. Two elliptical testes are sitmated in the mid-region of the worm. 
They lie close together and are of approximately equal size, their length ranging 
from 0-16 to 0-25 mm. and their width from 0-12 ¢0 0:17 mm. There are six Jong 
slender cement glands which are pressed together. Two of the glands reach as far 
forward as the anterior testes. Saefftigen’s pouch is pyriform; there is a bursal 
cap; and the male aperture is terminal. 
