508 Gcori/I luc Siveet : 



and given by Looss as characteristic of this species, is clearly 

 seen in these specimens. The mouth capsule is cup-shaped, and 

 contains no teeth. The elongcited triangular shape of the 

 "dorsal gutter," as seen in transverse section exactly agrees 

 with that described by Looss in his specific diagncjsis. 

 Oesophagus: — In length these are 1.7o mm., 1.55 mm., 1.95 

 mm., 1.86 mm., and in thickness, minimum .42 mm., ma.ximum 

 .54 mm. ; minimum .39 mm., maximum .54 mm. ; minimum 

 .33 mm., maximum .48 mm. ; and minimum .4 mm. ; 

 maximum .6 mm. respectively. It will be seen from this 

 that the oe.sopliagus is rather thinner than that quoted 

 by Looss for Sc/. edentatniii, and about the same as that 

 of 8cl. equinum (s.s.) but on comparing the transparent head 

 of these forms with Looss' figures (pi. i., fig. 11, etc.) of the two 

 species, there is no doubt that these 4 specimens belong to Scl. 

 fdentatum, quite apart from other points of similarity. The 

 same relation between the widths of oesophagus and body and 

 the same sudden enlargements of the oesophagus behind the 

 nerve ring, are here seen. 



The excretory pore opens far forward on the head, but the 

 cervical papillae are not visible in any one of the 4 specimens. 

 The great thickness of the skin is especially well seen in two 

 individuals, and in all '" the slight general torsion of the body 

 round its long axis." Tlie female opening is, except in one 

 specimen, curiously indistinct. In that one, the first of those 

 named above, the vulva is still surrounded by the peculiar brown 

 cement, and so its position, 8.25 mm. from the anus, is clearly 

 seen. But it is very indefinite in each of the others — it appears 

 in them to vary between 7.5 mm. and 11 mm. in front of the 

 anus.^ The blunt tail of Scl. edentatus is seen here. 



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



Locality. — Horsham, Victoria; June, 1903. 



Not i^reviously recorded (as such) in Australia. 



No. 2. — Sclerostomum vulgare, l.ss., 1901. 



— Scleruatumuin aniuituni, Kudolphi, according to Poeppel 

 (v. Looss, '01, p. 78). 



Sclerostomum. — 14 females. 1 male. Lengths, male 15.6 mm., 

 females 18 to 23 mm. (average 19.3 mm.) ; thickness, male .94 



