362 ON SOMK TREMATODE PARASITES OF AUSTRALIAN FROGS. 



Jb'ig.65. — L.S.,Goryo(iera australiensis (xl80), showing vosicula 

 semiiialis, ejaculatory duct, common genital chamber, me- 

 traterm. 



Fig.66. — T.S., Gorgodera australiensis (x3o0), showing yolk- 

 glands and duct, oviduct, ootype, Laurer's canal. 



Fig. 67. — T.S., Gorgodera australiensis, showing the arrangement 

 of the uterine loops behind the testes. 



Fig.68.— T.S., Gorgodera australiensis (xl20), through ovary, ovi- 

 duct, receptaculum seminis uterinum, etc. 



Fig. 69. — Mesocoelium mese^mbrinum (x40), whole-mount with the 

 uterus only moderately filled with eggs, so that the general 

 anatomy is more or less visible. 



Fig. 70. — L.S., Mesoco&lium, mesembrinum (x27), through the ex- 

 cretory vesicle. 



jti'ig.7i. — T.S., Mesocoelium mesemhrinum (x200), passing through 

 the bifurcated anterior end of the excretory vesicle. 



Fig. 72. — T.S., Mesocodium mesembrinum (xl45), passing through 

 the copulatory organs and the oesophagus. 



Fig. 73. — T.S., Mesocoelium mesembrinum (x200), through the 

 vagina, ejaculatory duct, etc. 



Fig. 74. — T.S., Mesocoelium mesembrinum (x200), through the 

 cirrus-sac, vagina, testes, vas deferens, etc. 



Fig.75. — T.S., Mesocoelium mesemhrinum (x200), through Laurer's 

 canal, etc. 



Fig.76.— T.S., Mesocoelium mesembrinum (x200), through ovary, 

 ootype, shell-gland, etc. 



Fig. 77. — U.S., Fleurogenes freycineH (xl05), showing the V- 

 shaped excretory vesicle. 



Fig. 78. — H.S., Fleurogenes freycincti (xll5), showing the posi- 

 tion of the genital opening . 



Fig. 79. — Fleurogenes freycineti (x70), whole-mount, showing the 

 arrangement of the uterine loops. 



Fig. 80. — Fleurogenes freycineti (xl40), near the surface, showing 

 the form and arrangement of the spines or scales. 



PosTCRiPT [addrcl 9th iVovember, 1912]. — On Noveniber 1st, I 

 obtained from the duodenum of two specimens of Eyla 

 citropus, collected at Springwood, ninety-four specimens of 

 Mesocrrlium oligoon; up to this time, I had obtained only 

 two speciriKMiR of this worm. 



