342 ON SOME TREMATODE PARASITES OF AUSTRALIAN FROGS, 



posterior end of body. Pharynx well-developed, spherical, 0-064 

 ram. in diameter; cesophagus moderately short; intestinal limbs 

 short, ending alongside the testes, some distance in front of the 

 ventral sucker. Excretory vesicle large, V-shaped, its limbs end- 

 ing anteriorly just behind the testes; excretory pore terminal. 

 Testes large, laterally placed, just anterior to ventral slicker. 

 Cirrus-sac very large, in front of the testes. Genital pore along- 

 side the oral sucker. Ovary near and partly in front of the right 

 testes; vitelline glands few and rather large, and in frunt of the 

 intestinal limbs; loops of the uterus without a second loop cross- 

 ing the middle line. Eggs small, yellow and brown, rather 

 elongated, flattened, elliptical, very numerous, 0-0236 mm. long 

 by 00117 broad. 



Host, Hyla freycineti, in the duodenum. 

 Type-specimen in the Australian Museum, No. W. 344. 

 This species was found in the duodenum of llyla frcy- 

 cincti, a not very common frog found in the Sydney district. 

 I met with it only once in 35 frogs examined, and obtained 

 seven specimens. Of these, four were prepared as whole- 

 mounts, and three cut into sections, two having been fixed 

 in Flemming, and five in sublimate acetic. They were all 

 very nearly of the same size, and the size of the mounted 

 specimens is about the same as that of the living, in a state 

 of rest. All the measurements given represent the average 

 measurements of the four mounted specimens, and the parts 

 concerned are so nearly alike in size, that the figures very 

 nearly fit any one of the specimens. The specimens mounted 

 whole were very slightly flattened by the vaseline-method 

 mentioned above, and even this slight pressure caused the 

 penis to protrude a little in every case (Fig. 16). 



The hodyy which is comparatively thick, presents an oval 

 outline, narrower anteriorly, wider and more bluntly rounded 

 off behind. The oral sucker is larger than the ventral, the 

 ratio beinc- 7:6; and while the foi'mer is subterminal, with 

 its opening directed ventrally, the latter is situated in the 

 middle of the body. The body is covered by rows of close-set, 



