350 
Queensland Trematocles 
ventral sucker is slightly larger than the oral. Close behind it lies a 
somewhat kidney-shaped discus. There is a small pharynx, a moderately 
long oesophagus and diverticula extending almost to the posterior end 
of the body. No other organs were visible. 
REFERENCES. 
Breinl, A. (1913). Nematodes observed in North Queensland. Australian 
Institute of Tropical Medicine. Report for the year 1911, pp. 39-48. 
Cobb, N. A. (1891). Parasites in the stomach of a cow. Agric. Gazette JV.S.W. 
II, pp. 614-615. 
Johnston, S. J. (1901). Contributions to a knowledge of Australian Entozoa. 
On a new species of Distomum from the Platypus. Proc. Linn. Soc. JV.S. W. 
1901, pp. 334-338. 
- (1912). On some Trematode parasites of Australian Frogs. Ibid, xxxvii, pp. 
285-362. 
Johnston, T. PI. (1909). On a new reptilian Cestode. Journ. and Proc. Roy. 
Soc. JV.S. W. xliii, pp. 103-116. 
- (1912). Notes on some Entozoa. Proc. Roy. Soc. Queensland , xxiv, pp. 63-91. 
•- (1913). Cestoda and Acanthocephala. Australian Institute of Tropical 
Medicine. Report for the year 1911, pp. 75-96. 
Krefft, G. (1871). On Australian Entozoa, with descriptions of new species. 
Trans. Entom. Soc. JV.S. W. 1871, II, pp. 206-232. 
v. Linstow, O. (1898). Nemathelminthen von Herrn Richard Semon in Australien 
gesammelt. Denkschr. d. med. Naturw. Gesellsch. Jena , vm, pp. 469-472. 
MacAlpine, D. (1891). Remarks on a fluke parasitic in the Copper-head Snake. 
Proc. Roy. Soc. Viet. 1891, p. 40. 
Sweet, Georgina (1909). The Endoparasites of Australian Stock and Native 
Fauna. Proc. Roy. Soc. Victoria , xxi (new series), pp. 454-527. 
EXPLANATION OF PLATES XXIII, XXIV. 
The following letters apply to all the figures : 
C.B. Cirrus-pouch. 
Ex. Excretory vesicle. 
Ov. Ovary. 
P.G. Genital aperture. 
R.S. Receptaculum seminis. 
T. Testes. 
Fig. 1. Echinostoma elongatum ( x 13). 
Fig. 2. Echinostoma australasianum ( x 8). 
Fig. 3. Eurytrema crucifer (xl33). 
Fig. 4. Mesocoelium microon ( x 33). 
Fig. 5. Lepoderma nisbetii ( x 67). 
Fig. 6. Dolichopera parvula (x33). 
Fig. 7. Aptorchis aequalis (x50). 
Fig. 8. Prosthogonimus vitellatus (x 20). 
Fig. 9. Hemistomum hr achy mum (x44). 
All the figures are drawn from the ventral surface. 
