330 AUSTRALIAN ENTOZOA, NO. II. 



Fig. 4.— Transverse section through the vesicula seminalis and its surround- 

 ing sac ( X 50). 



Fig. 5. — Transverse section through the anterior end showing common 

 genital opening and chamber ( x 15). 



Fig. 6. — Portion of the worm showing termination of genital ducts ( x 20). 



Fig. 7.— Transverse section through the ovary showing Laurer's canal, 

 ootype and vitelline duct ( x 20). 

 All, except fig. 1, drawn with the camera lucida. 



Reference letters. 



c.g.c, common genital chamber. — c, cirrus. — ej.d., ejaculatory duct. — 

 ex.c, excretory canal. — ex. v., excretory vesicle. — g.p., genital aperture. — 

 int., intestine. — L.C, Laurer's Canal. — m.s., muscular sac. — oo., ootype. — 

 0.$., oral sucker. — ov., ovary. — ovid., oviduct. — 2)Ji., pharnyx. — pr.g., pro- 

 state gland. — s.g., shell glands. — ^i cO t,^ testes. — ut., uterus. — v.d., vas 

 deferens. — v.g., vitelline glands. — vit.d., vitelline duct. — r.s., ventral sucker. 

 v.i^em., vesicula seminalis. 



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