512 Gcoiyhia Siveet : 



the specific characters of that species, but differing in one or 

 two linear dimensions which vary in such a way as to make it 

 probable that it may represent a new species not included in 

 those described by Looss. But in view of the paucity of 

 material, and of the fact that the head, which, however, appears 

 to resemble that of ('. pocuJatum, is badly damaged, it is Aviser 

 at present to regard this individual as a variety allied to this 

 species. The points in which it shows a difference from the 

 species named are as follow: — Oesophagus, length .7 mm. ; dis- 

 tance from anus to tip of tail, .42 mm. Vulva .07 mm. in front 

 of anus : i.e., the oesophagus is 1 mm. shorter in a longer 

 individual of the same sex, preserved together and apparently 

 of similar condition of maturity; the tail also is .12 mm. longer 

 than the longest recorded of the original species, while the 

 distance between anus and vulva is only tw^o-fifths of that of 

 (' . pncuJatum. These variations do not appear attributable to 

 distortion during preservation, since Nos. 4 and 5 have been 

 preserved together throughout, or to individual variations of any 

 kind, since they do not show^ any conformity with each other. 



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



Locality. — Horsham, Vic. ; June, 190.'5. 



Not previously recoi'ded from Australia. 



No. 6. — Cylichnostomum sji. 



Another of this series of specimens is a small agamous 

 G'l/Iichnontoinc, which, I l)elieve, belongs to ('. poculatuni, but 

 Avhich is hard to determine owing to the uuich contracted con- 

 dition of the head region, and the aljsence of reproductive organs 

 and opening. The chief determinable features of specific value 

 are as follow: — Length of worm 4..'^ mm., extreme diameter 

 .18 mm. Length of mouth capsule e(|ual to greatest diameter. 

 Walls thin anteriorly, becoming thicker posteriorly, curved to 

 form a much swollen cylinder. Dorsal gutter short. Oeso- 

 phagus, length .276 nnn., maximum diameter .036 mm., mini- 

 mum diameter .024 mm. The intestine is abnormal in showing 

 no sign of piguicntation. Anus .12 mm. from tip of tail, which 

 ta])ers from the somcwliat Ijroad base to the tip. No repro- 

 ductive organs or openings are present. 



