ON SOME QUEENSLAND TRE:\IAT0DES. 
363 
Petalodistomum cymatodes sp. n., from the body- 
cavity of Dasybatis kuhlii. 
In the new species and genera a diagnosis of each is given, 
together with a more extended account ot the anatomy and 
remarks on the affinities and position in the system. 
From Mammals. 
On two occasions a number of trematodes of remarkable 
form were collected by Mr. F. H. Taylor, of the Institute, 
from the intestine of dugongs (Halicore dugong), caught 
off the Queensland coast. From the first animal examined 
sixteen of these worms were obtained; from the second, ten. 
As the discoverer of the form, I have associated Mr. Taylor’s 
name with the species. Allied in their general organisatio7i 
to the monostomid family Notocotylidm, these worms exhibit 
a number of peculiar and unique features, as set out in the 
following description : 
Rhabdiopoeus^ taylori gen. et sp. n. (Figs. 1-4 and 
15-26.) 
Diagnosis. — Large size, elongated, rounded at each end, 
convex dorsally and concave ventrally. Ventral surface 
covered with large hooks. Excretory pore on the dorsal 
surface near the posterior end. Complex, protrusible 
proboscis lies in a cavity near the posterior end of the 
body. No pharynx; intestinal limbs joined at their posterior 
ends by a transverse commissure. Genital pore close 
alongside the sucker; copulatory organs very elon- 
gated and comparatively narrow, the cirrus sac 
surrounding only a part of the vesicula seminalis. Testes 
symmetrically placed in the hinder end of the body, outside 
the intestinal limbs. Ovary between the testes ; large shell- 
gland near the ovary. No Laurer’s canal nor receptaculum 
seminis. Yolk-glands behind the testes and outside the 
* pu(5diov, a little rod ; ttoihv, to make. 
