En(Jop<tr(tsites. 511 



Host. — Horse: stomach (and intestines (?)). 



Locality. — Horsham, Victoria ; June, 1903. 



Two types in the museum of the Biological Department of the 

 University of Mell)ourne. 



Remarks. — The marked intermediate character of these three 

 specimens raises a suspicion in one's mind as to the validity of 

 the separation of the forms described as Tr. minor, Tr. serratus 

 and Tr. iuterwtdius. into distinct species. But in view of the 

 small amount of material of Tr. intermedius available, and of 

 llie geographical isolation of this country, it has seemed wiser in 

 the interests of clearness to make a new species of these three 

 specimens, the only representatives of the genus yet known in 

 Australia. Unfortunately the material was in a very unsuitable 

 condition for histological examination. 



No. 4. — Cylichnostomum poculatum, Lss., 1901. 



Cylichnostoi7ium. — 1 female. Length, 9.6 mm. Head not 

 constricted off fi'om body ; skin annulated. Mouth collar flat- 

 tened, and cut off from skin. External leaf-crown has approxi- 

 mately 36 long, flne teeth, with tips projecting beyond mouth- 

 collar. Submedian head-papillae long, flattened, and with tips 

 ;ij)]iareutly constricted ; lateral head-papillae not conspicuous. 

 Depth of mouth capsule equal to its external diameter ; walls 

 thin anteriorly but becoming thicker posteriorly. Internal leaf- 

 crown typical, the elements being short and thick. Dorsal 

 gutter conspicuous but short. Excretory pore and cervical 

 papillae in region of nerve-ring. Oesophagus, length .84 lum., 

 maxinmm diameter being .13 mm., and minimum diameter .078 

 mm. Transverse section of intestine oval, being flattened 

 laterally. Tail long, broad at base and tapering to tip. Anus 

 .33 mm. from tip and .156 nam. behind vulva. 



Host. — -Horse: stomach (and intestines (?)). 



Locality. — Horsham, Victoria; June, 1903. 



Not previously recorded from Australia. 



No. 5. — Cylichnostomum sp. (c.f. poculatum), Lss., 1901. 



Associated with the specimen just described of C. poculatum 

 was another individual (female) 10 mm. long, having in general 



