BY VEEA IRWIN-SMITH. 315 



nature of a reservoir, although only a few eggs are present in it. It is directed 

 either straight back, or curved forward on the vestibule, and is followed by a 

 common trunk 576 ^ long and 37 ju wide, folded on itself and divided posteriorly 

 into two branches which lead into the two posteriorly-directed uteri. These are 

 distended with egg's and measure, at their maximum width, 92 fx. 'I'hey are 

 coiled in the middle region of the body, the most anterior loop being found at 

 .85 to 1.52 mm. from the anterior extremity of the body, and the most posterior 

 at 2 mm. from the posterior extremity. Each uterus terminates in a slight en- 

 largement, dark in colour, the receptaculum seminis, which leads without abrupt 

 transition into the oviduct (Text-fig. 16). The receptaeula seminis are found at 

 a distance of 1.5 mm. to 1.8 mm. from the posterior end, not far from the 

 position of the posterior termination of the spine row (Text-fig. 15). The two 

 ovaries are much coiled in the region between this and the anus, extending to 

 within .35 mm. of the extremity of the body. 



The egg's are broadly oval, with clear, thick shells, measuring 38 fx. in length 

 and 25 ja in transverse diameter (il'ext-fig. 14). 



Host. — Hinulia sp. Location. — Alimentary canal.- Locality. — Flindei-s Is- 

 land, Bass Strait. Collected by Dr. J. B. Cleland, November 25, 1912. 



Paratype in the Australian Museum, Sydney (Registered No. W. 923). 



Hinidia, a subgenus of Lygosoma, is very widely distributed throughout Aus- 

 tralia, the commonest species about Sydney being Lygosoma (Hinulia) taeniolatum 

 Shaw. It was probably from this species that the above-described nematodes 

 were taken. Two other specimens of Hinulia, species not determined, are re- 

 presented in Dr. Cleland's collection as hosts for nematodes, one taken at North 

 Bay in October, 1914, the other at Flinders Island on the same date as the 

 specimen from which the Rictularia disparilis were obtained. The only nematodes 

 collected from them are Oxyuriidae, one female from the North Bay specimen, 

 and four females from "Hinulia No. 5, Flinders Is." There is, in addition, one 

 female Oxyurid from "a small lizard, Flinders Is.," taken at the same time as the 

 two Hinulia. 



Dr. T'. H. Johnston's catalogues of Australian reptilian Entozoa (1912 and 

 1916), contain records of Entozoa from three species of Hinulia, viz., taeniolatum, 

 quoyi and tenue; but only one of these refers to a nematode, and that is a species 

 of Physaloptera from Hinulia tenue Gray. 



The other lizard hosts in the Cleland collection are Varanus sp., Lialis bur- 

 toni and Gymnodactylus platurus, and the nematodes from these aU belong to the 

 genus Physaloptera. The new form described here is, therefore, e^ndently rare. 

 Apparently nothing like it has been observed before in any Australian reptile, 

 the only nematodes listed in the catalogues being aU species of the four genera 

 Ascaris, Strongylus, Filaria, and Physaloptera. 



Among birds, one nematode with a cuticular ornamentation of spines has been 

 recorded in Australia. Ihis was found in a sea-bird, Daption capensis (Cape 

 Petrel), and was listed by Dr. T. H. Johnston as Rictularia shipleyi Stoss. (1912). 

 However, Dr. Johnston adds the explanatory note — "This record is based upon 

 material collected near Sydney by Mr. L. Harrison. His description of the 

 parasite satisfies me that the worm was Rictularia, and most probably R. shipleyi. 

 Unfortunately, the nematodes have been mislaid, and I am therefore, at present, 

 unable to confirm the specific identity" (1912, p. 106). The species referred to 

 was described originally by Stossich as Gnathostoma shipleyi (from the great) 



