370 
S. J. JOHNSTON. 
also agrees pretty well with that of Catatropis. Eha bdio- 
poeus differs from the latter further in having the intestinal 
limbs fused behind, in the absence of the serial ventral 
glands, as well as in the presence of the complicated proboscis 
and the thick layer of spines on the ventral surface. 
Opisthotrema cochleare Fisch. 
Eleven specimens were found in the oe sop hag ns of 
Halicore dugong, by Dr. Strangman, at Port Darwin. 
They were smaller than SempeFs specimens, on which 
Fischer worked, and were all sexually immature. The 
largest specimen measured 7 mm. long by 4 mm. broad. 
The majority were close to this in size, while the smallest 
was only 3 mm. long. The sexual ducts were all well formed, 
though the gonads themselves were only represented by very 
small patches of cells. The already formed cirrus distinguishes 
these specimens at once from 0. pulmonale von Linstow 
found in the lungs of the same host. The position of the 
testes is also different, being external to the intestinal limbs 
in O. cochleare, but internal to them in 0. pulmonale 
(24). Fischer (14) mentions the spines on the ventral surface 
of the species under discussion, but makes no mention of the 
fact, readily seen in sections, that the anterior part of the 
dorsal surface bears smaller, more scattered spines. 
From Birds. 
Fam. Echinosto midie. 
Echinostoma revolutum Froel. 
One complete specimen, and a fragment consisting of the 
posterior half, were obtained from the intestine of the 
black-duck,’^ Anas supercil iosa. According to Looss 
this species of worm (described under name E. echinatum 
R.) exhibits considerable variation, and the description given 
