TYPES OF SPECIES OF CKSTODA — KREFFT. 15 



The female organs lie ventrally. The large slightly lobed 

 ovary is situated in the middle of the posterior half of the 

 segment behind the testes and the vitellarium. The vagina 

 passes out dorsal ly and, as already mentioned, opens ventrally 

 to the male aperture. A receptaculum seminis is absent. The 

 vitelline gland is a compact organ lying just in front of the 

 middle of the ovary, this position of the yolk gland being a 

 characteristic of the genus. The uterus is at first a dorsally 

 placed transverse tube which eventually becomes sac-like and 

 occupies almost the whole of the medulla. 



In regard to Cobbold's suggestion of identity between T.Jorsteri 

 and T triangularis, a comparison of the description of each 

 as given by Fuhrniann 35 is sufficient to show that the two are 

 distinct. Dr. G. Sweet 36 has misquoted the latter author as 

 having examined specimens of T. triangularis from dolphins 

 captured in Sydney Harbour. 



TiENIA FLAVKSCENS, Krefft. 



(Plate ii.) 



This parasite was described very meagrely by Krefft 37 , the 

 hosts mentioned being the Black-duck (Anas superciliosa, 

 Gmel.) and the Blue-wing Shoveller (Spatula rhynchotis, Lath.). 

 I am now able to add the following additional hosts, the Teal 

 (Nettion castanenm, Eyton), and the White-eyed duck (Aythya 

 aus trails, Gould), from New South Wales. 



The original account of this Cestode is insufficient, and, in 

 many details, incorrect. It may, therefore, be disregarded. The 

 following description is based upon an examination of the type 

 material from Anas superciliosa, from which it will be seen that 

 T. jlavescens is a typical member of the genus Diorchis. 



Diorchls Jlavescens is a rather narrow worm of about one 

 millimetre in maximum breadth. Most of the specimens were 

 from three to five centimetres long, though some were much 

 longer, one exceeding 8 - 4 cms. The scolex is small, being 0T95 

 mm. in width. The suckers are fairly well developed, the 

 diameter reaching nearly 01 mm. (PL ii., fig. 1). The cuticle 

 lining them is provided with abundance of minute spines 



35 Fuhrniann— Centr. Bakt. Orig., i., xxxv., 1904, p. 748. 



36 Sweet— Proc. Roy. Soc. Vict., xxi. (n.s.), 1909, p. 479. 



37 Krefft— Loc. cit., p. 219. 



