ON SOME QUEENSLAND TREMATODES. 
383 
pore outside the intestinal limbs ; copnlatoiy organs strongly 
developed ; cirrus sac large and club-like, vesicula seminalis 
long and coiled, extending back more than half-way to the 
gonads. Testes forming a U in the posterior end of the 
body, deeply lobed, and split up into several s eparate 
pieces on each side. Ovary lobed, near the anterior end ot 
the testes. Laurer’s canal, but no receptaculum seminis. 
Eggs with filaments. 
Diaschistorchis is distinguished from all the other 
genera of its family by the less conspicuous development of 
the collar, by the form of the testes and the more complex 
arrano-einent of its excretorv vessels, besides differino' from 
each genus in a number of other respects. In appears to be 
nearer to Epibathra and Glyphicephalu s than the others, 
agreeing fairly well with these in the general configuration 
of their organs except the testes; and, in the arrangement of 
its excretory vessels, differing from these less than from the 
other genera. 
Specimens in the Museum of the Australian Institute of 
Tropical Medicine, No. T. 36. 
From Fishes. 
Fam. Fasciolidie. 
Pleorchis oligorchis sp. n. (Figs. 11, 38-40.) 
Diagnosis. — Above middle size, rectangular in shape, 
without spines. Oral sucker very large and strong; ratio 
of oral to ventral sucker 7:3. Pharynx a little smaller 
than the ventral sucker, short oesophagus, intestinal limbs 
wide and straight, with a single anterior Ccecum on each side 
Excretory vesicle reaching* the receptaculum seminis in front. 
Genital pore in middle line, in front of and very close to the 
opening of the ventral sucker. Testes in two parallel rows, 
generally five on one side and six on the other; no cirrus 
