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3. Johnston, 1901. "On anew species of Distomum from the Platypus. 

 Proc. Linn. See. N. S. Wales, Vol. xxvi. 



4. ,1912. " On some Trematode Parasites of Marsupials and of 



a Monotreme." Proc. Linn Soc. N. S. Wales, Vol. xxxvii. 



5.L00SS, 1899. " Weitere Beitriige zur Kenntniss der Trematoden-Fauna 

 Aegyptens u.s w." Zool. Jahrb. Syst. , xii. 



6. 1902. " Ueber neue u. bekannte Trematoden aus Seeschild- 



kroten." Zool. Jahrb. Syst., xvi. 



7.M0NTICELLT, 1896. " Di un ematozoo della Thalassochdys caretta 

 Linn." Intern. Monatschr. f. Anat. u. Phys. , Vol. 13. 



S.Odhner, 1902. "Trematoden aus Reptilieii." Ofversigt vetensk. 

 Akad. Forh. Stockholm, lix., Pt. 1. 



9. , 1912. " Zum naturlichen System der digenen Trematoden, 



V." Zool. Anz., xli. 



IO.Ofknheim, 1900. "Ueber eine neue Distomiden-gattung." Inaugural- 

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11. Pratt, 1902. " Synopses of North American Invertebrates, xii. Tre- 

 matodes." American Naturalist, xxxvi. 



12. Stiles and Hassall, 1908. " Index Catalogue : Trematoda and Tre- 

 matode Diseases." Bulletin No. xxxvii. Hygienic Laboratory, 

 U.S.A. 



REFERENCE LETTERS. 

 C, cirrus — C.g., cerebral ganglion — C.s., cirrus-sac — E., excretory 

 vessels — Ex. p., excretory pore — P]x. v.. Excretory vesicle— G. p., genital 

 aperture — G.c, common genital chamber — Int., intestinal limbs — L.c, 

 Laurer's canal — Lt. , lateral nerve-trunk— Q^s., oesophagus — O.s., oral 

 sucker — 0., ovary — O.d., oviduct— oot., ootype — Ph., pharynx — Pr., 

 prostate — P.Pr. , pars prostatica — R.s.u., receptaculum-seminis-uterinum 

 — T., testes— ut., uterus — Vag., vagina — V.d., vas deferens — V.s., vesi- 

 cula seminalia — V.sk., ventral sucker — Y.d., yolk-duct — Y.g., yolk-gland. 



EXPLANATION OF PLATES XXXVIII. -XXXIX. 

 Plate xxxviii. 

 Moreauia mirabilis (except Fig.2). 

 Fig.l. — Drawing of a whole mount ( x 15). A portion of the right lateral 

 border is turned over. The excretory and nervous systems have 

 been drawn in from a series of horizontal sections. The rest of the 

 drawing has been made with the camera lucida. 

 Fig. la. — Two eggs of Moreauia. 

 Fig. lb. — Surface- view of the spines on the cirrus. 

 Fig.2. — Hapalotrema constrictum Leared (after Looss). 



