h\ S. J. JOHNSTON. 315 



lively small follicles, extending anteriorly as far as the intes- 

 tinal fork., and inicard>< beyond the intestinal limbs, both in 

 front of, and behind the ovary. Uterine loops as in the other 

 two species. Eggs, 0036 x 0-021 mm. 



Host : Hyla freycineti, in the stomach. 



Type-specimen in the Australian Museum, No. W.336. 



Fifteen specimens of this worm were found in the stomach 

 of Hyla freycineti. In the robustness of its form, it stands 

 intermediate between D. trypherus and D. ischyrus. The aver- 

 age length is 2-2 mm., breadth 0-65 mm.; oral sucker 0-189, 

 ventral 0145 mm. The relation in size of the suckers is about 

 the same as in the last-named species, with which it agrees 

 also in possessing a very wide and voluminous excretory 

 vesicle, as well as in having the ovary (0-261 x 0-212 mm.) 

 larger than the testes (0-245 x 0-179 mm.). It differs from 

 this species, however, in the lateral position of the ovary, in 

 the much smaller form of the yolk-gland follicles, and in the 

 extension of these glands. On the whole, it appears to be 

 more closely related to D. trypherus, from which it differs prin- 

 cipally in the relative size of the ovary and testes, in the ovary 

 lying very close to the ventral sucker, and in the yolk-glands 

 extending inwards beyond the intestinal limbs in front of the 

 ovary. The follicles of the yolk-glands are about the same 

 size (0-055 x 0-027 mm.). 



This genus appears to be more closely related to Opisthio- 

 (llyphe Looss, than to any others, and its members may be 

 looked upon as Australian representatives of 0. endoloha, 

 occurring in the intestine of E^^ropean frogs. It agrees with 

 the genus named in the configuration of the alimentary canal 

 and the excretory vesicle ; to a less extent, in the topography 

 of the genital glands and the yolk-glands, in the presence of 

 Laurer's canal, and a receptaculum seminis ( ?), in the charac- 

 ter of the copulatory organs, and in the form and extent of 

 the uterus. Dolichosaccus differs from Opisthioglyphe, how- 

 ever, in the details of many of these organs, as well as in some 



