PLATE III. 



Fir,. 16. Ogmogaster pliratus (Creplin) ; ex Leptonychotes weJdij]-!. Ventral view ; a, oral .sucker ; h, 



wavy margin uf body ; <jp, genital pore ; nv, ovary ; r, rugae ; /, /', testes ; /, uterus ; //, 



yolk-glands. 

 Fio. 17. Hemlurus outi-si, Leiper and Atkinson ; ex Tmiiiitoiiiiis bernacchii. a. oral sucker ; b, ventral 



sucker ; c, cirrus ; </, abdomen : rx, excretory vesicle ; </, branch of gut ; gp, genital pore ; 



or, ovary ; pli-, pharynx ; xv, seminal vesicle ; t, t', testes ; ./, uterus ; y, y , yolk-glands. 



FIG. 18. Aponurus Loievml, Leiper and Atkinson ; ex Trematomus lifi-niKrltil. Lettering as in Fig. 17. 

 FKI. 19. - Poilocntt/Je pi'inti'Ili, Leiper and Atkinson : ex Trematormts bernacchii. Lettering as in Fig. 17. 

 Fid. 20. Lepodora i/iin-anl!, Leiper and Atkinson ; ex Tr<-in<it<nnnx lirnmccliii. Lettering as in Fig. 17. 



Fid. 2l.Allocreadiumfowleri, Leiper and Atkinson ; ex Tmiiiitiiiiiiin lirntiin-Iii!. Immature form. Letter- 

 ing as in Fig. 17. 



