Plate VII. 



AxiNE HETEEOCEECA. 



Fig. 1. The whole worm viewed from the dorsal side ; from a specimen killed under 



a slight pressure, a-, dorsal opening of unknown nature {ff. fig. 4, PI. VIII) ; 



*, point of junction of the yolk-duct and the vaginal canal. 

 „ 2. I, Chitinous framework of the posterior sucker, x 73 diam. IT, terminal 



portion of the posterior arm of the median u-shaped piece. Free-hand. 

 „ 3. Ovarian ova near the oviduct end. x 305 diam. 

 „ 4. Section of the posterior sucker pai-allel to the median piece of the chitinous 



framework, x 204 diam. 



A.XINE ABEEEANS. 



Fig. 5. The whole worm viewed from the dorsal side. 

 „ G. a, chitinous armature of the terminal portion of the vas deferens, x 305 

 diam. h, the same of the vagina, x 305 diam. 



AxiNE TEIANGULAEIS. 



Fig. 7. The whole worm viewed from the ventral side. 

 ,, 8. a, cup-shaped organ of the genital atrium, x 204 diam. h, spine of the 

 same. x460 diam. 



