244 AUSTRALIAN REPTILIAN ENTOZOA 



tion of A. spinulosum from Chelone my das from Egypt, 

 states that mature specimens are from 5 to 5.6 mm. long 

 and are thus much smaller than Braun's specimen of A. 

 sderoporum. Later (1902, p. 430) he referred to specimens 

 7.5 to 8 mm. long, about 1.6 mm. broad and 1 to 1.6 mm. 

 in thickness, and mentioned that they were of a pale flesh- 

 red colour when alive. He also stated that the species was 

 unmistakeably hke Braun's form. My specimens (collected 

 on Mast Head Island, at the southern end of the Barrier 

 Reef by Mr. L. Harrison in October, 1910) are from 7.5 to 

 9 mm. long by from 2.4 to 3 mm. broad. The characters 

 are those of A. sderoporum. The anatomy is strikingly 

 like that figured by Looss (1902) for A. spinulosum, the main 

 difference being that, in some of my specimens, the vitellaria 

 extend a little further forward and the testes are more 

 markedly lobed. 



Octangium sagitta was originally described by Looss 

 (1899, p. 772) as Microscapha sagitta, being transferred later 

 to Octangium (1902, p. 685). 



39. Erethmochelys imbricata L. Syn. Chelone imbri- 

 cata L. 



Shipley (1900, p. 532) described a trematode which he 

 regarded as belonging to Monostomum, trigonocephalum Rud., 

 the material having been collected by Willey (Kew Britain ?) 

 Braun (1901) recognised that Shipley had had more than 

 one species before him. He stated (p. 51) that M. trigono- 

 cephalum Shipley 1900, p. 532, pi. 54, fig. 1, did not belong 

 to Rudolphi's species but to M. ruhrum (p. 45) ; that the 

 form figured on plate 44, figs. \c, 3, 4, 5, 7, as well as 

 Cricocephalus delitescens Looss (1899, p. 759) belong to M. 

 album ; and (p. 38) that Pronocephalus trigonocephulus Looss 

 (1899, p. 756) as well as some of Shipley's forms belong to 

 Rudolphi's species. In 1901 Looss (1901, p. 566) recognised 

 that h{j» trigonocephalus was distinct from Rudolphi's and 

 consequently re-described it as a new species Pr. ohliquvs, 

 while Rudolphi's species was made (1901, p. 567: 1902, 

 p. 548) the type of a new genus Pleurogonius. He stated 

 (1902, p. 549) that some of Shipley's forms, viz., those 

 described and figured, belonged to this species, while certain 

 forms which were figured but not described, belonged to 

 Cricocephalus alhus (K. & Hass.) Looss, which Looss admitted 



