ON SOME QUEENSLAND TRE:\[AT0DES. 
375 
surface of the body or in the intestine. As no other trema- 
todes were found in the host, which was subjected to a careful 
exainiuatiou, and tlieform and size of the eg'gs found conform 
pretty well with those in closely related species, it is almost 
beyond doubt that these eggs belong to the animal witli which 
they were found associated. They are large, oval in shape, 
yellow in colour, 0*107 mm. long by 0*073 mtn. broad. 
This worm appears to be closely related to Typhlocoelum 
cucumerinum End. as described by Kossack ( 18 , pp. 543- 
548), in spite of the occurrence of the small ventral sucker in 
the latter. I have been able to find no trace of such a sucker 
in my specimens, either in the whole mounts or sections. The 
occurrence of such a sucker in worms, in all other respects 
obviously associated with the Monostomidas, must, I think, be 
looked upon as an atavism — a thing of local interest, but of no 
great systematic importance. 
T. retie ul are differs from T. cucumerinum in size and 
shape; in the more elongated form of its pharynx; in the 
greater extension forward of the anterior testis and the greater 
length of the separate vasa deferentia ; in the arrangement of 
the yolk-glands behind the intestine ; in the much smaller 
size of the ovary ; in the very characteristic dorso-ventral 
winding of the uterine loops; and in the considerably smaller 
eggs. 
Allopyge antigones gen. et sp. n. (Figs. 7, 31 and 3*2.) 
Di ag*nosis. — Size large, body muscular, narrowed towards 
the ends; small dorsal muscular plug projecting into the 
cavity of the oral sucker. Intestinal limbs hardly branched, not 
straight, but undulating. Genital pore at or behind the 
intestinal fork; cirrus sac lying therefore entirely behind 
the intestinal fork. Copulatory organs moderately developed. 
Yolk-glands more or less in grape-like follicles, lying closely 
upon the ventral and outer aspects of the intestinal limbs, 
meeting behind the intestine and extending forwards nearly 
up to the intestinal fork. Ovary and testes lying on a 
