12 



KKCOKDS UF THK AUSTRALIAN MUSKUM. 



Jacobi and Kowalewski differed from each other. T. trichosoma, 

 Linstow 20 , was mentioned as being very probably also a synonym, 

 it seems to me that Fuhrmann is correct. Linstow's specimen 

 was very small and immature. The I'ostellar hooks figured by 

 him are very like those figured by Krabbe 21 , and those seen by 

 me in Krefft's specimens. Other accounts dealing with this 

 Uestode are those given in 1850 by Diesing 22 , in 1877 by 

 Linstow 23 ("dealing with the armature of the parasite), in 1882 

 by Krabbe 24 , and in 1889 25 and 1891 26 by Monticelli. The 

 last mentioned author has misinterpreted tlie various male and 

 female glands, describing a double set of reproductive organs in 

 each segment whereas the genitalia are single though the ducts 

 are double. The main points of difference between our specimens 

 and the account given by European workers, are unimportant. 

 In the main I have found the relationships of the genitalia the 

 same as those mentioned by Fuhrmann and Kowalewski 

 especially by the former. Of the work of the latter only a 

 relatively brief English resume is available and one has to rely 

 on the figures (which by the way are very good) for a great deal 

 of detail. 



The vagina? are much closer to the vasa deferentia in our 

 specimens than is shown in Kowalewski's figures. The inner 

 nerve ring mentioned by him was not recognised and the strongly 

 developed anterior ring commissure mentioned by this author 

 and by Colin was scarcely recognisable though the posterior ring 

 commissure was readily seen. The anastomoses between the vasa 

 efferentia mentioned by him were not detected. The establish- 

 ment of the identity of T. tuberculata with D. Icevis, very 

 considerably widens the known range of this parasite which 

 occurs in at least thirteen different genera belonging to the 

 Anatidee (Duck family) 27 in the Northern Hemisphere. Krefft's 

 specimens were taken from Aythya australis, Gould, but I have 

 recognised the same species amongst Krefft's Kutozoa collected 



20 Linstow — Arch. Naturg., xlviii., 1SS2, p. 22. 



- 1 Krabbe — Bid rag til Kundskab oin Fuglenes Baendelorme in Dansk 

 Viden.sk Selsk. Skr. Naturwid, (5) viii., pp. 302-3. tigs. 165, 166. 



-'- Diesing — Systema helminthum, 1850, p. 541. 



aa Linstow -Arch. Naturg., xliii., 1877, pp. 1-1S. 



a * Krabbe— Dansk Vidensk. Selsk. skr. Naturwid, Math. (6), i., 1SS2, 

 pp. 349-366 (this work was not available to me). 



« Monticelli— Proc. Zool. Soc, IS89, p. 325. 



- !,; Monticelli Boll. Soc. Nat. Napoli, v., 1S91, pp. 151-3. 



" For list see Fuhrmann, 1906, hot, cit., p. 217, also Fuhrmann, 1908, 

 Loc. cit. under the various hosts mentioned. 



