BY S. J. JOHNSTON. 



739 



9. Looss. — "Die Distomen unserer Fische u. Fiosche." Bibliotheca Zoolo- 

 gica, Heft 16, 1896. 



10. " Nachlragliche Bemerkungeu zudeii Namen," etc. Zool. Anz. , 



xxiii., 1900. 



11. Ldkhe.— " Ueber Hemiuriden." Zool. Anz., xxiv., 1901. 



12. " Ziir Kenntniss einiger Distomeii." Zool. Anz., xxii., 1899. 



13. LuTZ, A. — " Distoina opisthotrias, ein neuer Parasit der Beutehatte." 



Revista do Museu Paulista, 1895. 



14. Odhner, T.— "Trematoden aus Reptilieu." Ofver. Vet. Akad. Forli., 



Siockholni, lix., 1902. 



15. Pkatt. — " Synopsis of North American Invertebrates, xii." American 



Naturalist, xxxvi. , 1901. 



16. Stii.es & Hassali,.^ — "An Inventory of the Genera and Subgenera of 



the Trematode family Fasciolidre." Arch. d. Parasitologic, i., 1898. 



EXPLANATION OF THE PLATKS. 



Figures 1-3 are drawings of whole inounts, made with the help of the 

 camera lucida. Figure 4 is a diagram compiled from a series of transverse 

 sections. These drawings were made by Mr. F. W. Atkins, of the Sydney 

 Technical College. Figures 5- 11 are untouched up photographs of sections. 



Reference letters. 



C.-s., cirrus-sac — C.v., ciliated vessel of the excretory system — Ej.d., 

 ejaculatory duct — E., excretory vesse\—E.s^., excretory sinus round the 

 oral sucker — E.s„., excretory sinus round the ventral sucker — G.p., genital 

 p(,re — G.C., genital chamber— /7i<., intestinal limbs — L.c, Laurer's canal 

 — L.y.d., longitudinal yolk-duct — M.I., longitudinal muscle — M.c, circular 

 muscle — 0., ovary — O.c.s., opening of ciliated vessel into oral sucker sinus 

 — O.e.v., opening of excretory vessels into the sinus — O.d., Oviduct — Oot., 

 ootype — P., penis— r/(., pharynx — P^Ph., pra^pharynx— Pr., prostate — 

 i?..s., receptaculum seminis — R.s.u., receptaculum seminis uterinum — S (f., 

 "shell-gland" — Sa\, supplementary vessel — 7\, testis — T.y.d., transverse 

 yolk-duct — Ut., uterus — i7<. a., ascending loop of uterus — Ut.d., descend- 

 ing loop of uterus — Vag., vagina— F.ci., vas deferens— T.s., vesicula 

 seminalis— r.cZ., yolk-duct— T.^., yolk -glands— 7. r., yolk-reservoir. 



Fig.l. — Harmostomum dasyuri, from the intestine of the marsupial "cat," 



Dasyurus viverrinus. 

 Fig.2. — Harmostomum fiimih, from the intestine of Perameles obesnla. 

 Fig. 3. — Mehlisia acuminata, from the intestine of Da-tymmn viverrinus 

 Fig. 4. — Diagram of the female organ of Mehlisia ornithorhynchi. 

 Fig.5. — Horizontal longitudinal section througli the posterior end of H. 



dasyuri;{ x 45). 



