360 ON SOMK TREMATODK PARASITES OF AUSTRALIAN FROGS, 



J<'ig.23. — T.S., rolystomum (x370), through vaginal openings 

 and sperm-reservoir of the vaginal canal. 



Fig. 24. — T.S., Foiystomum (xl30), through testis, and descending 



and ascending loops of the uterus. 

 Fig. 25.^ — L.S., Fohjstomuvi (x40), showing the relations of the 



distended uterus and the yolk-glands. 



Fig. 26. — H.S., folystomum (x30), showing the relations of the 

 genital organs, alimentary canal, etc. 



Fig. 27. — H.S., Folystomum (xl75), through the opening of the 

 genito-intestinal canal into the intestine. 



Fig. 28. — L.S., Folystomum (xl30), through the vaginal papillae. 

 Fig. 29.^ — Uiplodiscus megalochrus (x25); photograph of a whole- 

 mount. 



Fig. 30. — Uiplodiscus microchrus (x37); photograph of a whole- 

 mount. 



Fig. 31. — H.S., Uiplodiscus megalochrus (x35), showing the struc- 

 ture of the posterior sucker. 



Figs. 32-33. L.S. and T.S., respectively, through the posterior 

 sucker of Viplodiscus (x6o), showing the connective tissue 

 plug of large parenchyma-cells, etc. 



Fig. 34. — M.S., Diplodiscus megalochrus (x65), through pharynx 

 and intestine. 



Fig. 35.^ — H.S., Diplodiscus megalochrus (x300), through pharynx, 

 showing the muscular layers in its walls. 



Fig. 36. — T.S., through pharynx of same, showing the numerous 

 layers of circular muscle-fibros (x370). 



Fig. 37. — M.S., Diplodiscus megalochrus (xllO), through oral 

 sucker and its diverticula. 



Fig. 38. — T.S., Diplodiscus megalochrus (xlOO), through the buc- 

 cal diverticula and oesophagus. 



Fig. 39. — T.S., Diplodiscus megalochrus (x8o), through the geni- 

 tal opening. 



Fig. 40. — T.S., J)iplodiscvs megalochrus (x220), through vagina 

 and cirus-sac. 



Fig.41.— T.S., Diplodiscus megalochrus (x90), through testis. 



Fig. 42. — T.S., Diplodiscus megalochrus (x90), through ovary, ovi- 

 duct, and shell-gland. 



Fig. 43. — L.S. , Doiichosaccus trypherus (xSO), showing prse- 

 pharynx, Laurer's canal, etc. 



Fig. 44. — L.S., Doiichosaccus trypherus (xl60), through Laurer's 

 canal, etc. 



