

TREMATODES OF AUSTRALIAN BIRDS. 261 



Plate XVI. 



Fig. 16. — Harmostomum pulchellum, whole mount. x 45. 

 Fig. 17. — Clinostomum australiense, whole mount. x 15. 



Plate XVII. 



Fig. 18. — Austrobilharzia terrigalensis, whole mount with the 

 female lying in the gynecophoral canal of the male. x 44. 



Fig. 19. — The same species, showing the female almost com- 

 pletely freed from the gynecophoral canal of the male. x 35. 



Plate XVIII. 



Fig. 20. — Austrobilharzia terrigalensis, transverse section 

 through the male in the region of the ventral sucker. St., stalk 

 of the sucker, x 205. 



Fig. 21. — T.S. through the cirrus sac and male opening, x 222. 



Fig. 22. — T.S. through a pair at the level of the ventral sucker 

 of the female, x 240. 



Plate XIX. 



Fig. 23. — Cycloccelum taxorchis, whole mount. x 10. 

 Fig. 24. — Hcematotrepus adelphus, whole mount. x 10. 

 Fig. 25. — Hyptiasmus magnus, whole mount. x 6. 



