Plaie XXV. 



T R I s T M r JI N Z A W A E . 



Fig. 1. The whole worm viewed from the ventral side ; the viteharium is reprecented 



only on one side. 

 ,, 2. One of the hooks of the posterior sucker ; a small portion was broken off 



daring preparation, x 204 diam. 

 „ 3. Central portion of the reproductive organs viewed as a transparent object 



from the ventral side, x 75 diam. 



T R I s T M U M B I P A R A s I T I C U JI . 



Fig. 4. The whole worn viewed from the ventral side ; the vitellarium is represented 



only on one side. 

 „ 4a. An egg-shell, x oO diam. 

 „ 0. One of the chitinous corpuscles of the lateral margins of the body, x 204 



diam. 

 „ 6. Hooks of the posterior sucker, from the same pair, x 204 diam. 

 ,, 7. Median sagittal section of the body through the^region of the pharynx. 



X 73 diam. 

 ,, 8. Central portion of the genital organs viewed as a transparent object from 



the ventral side, x 50 diam. 



Tri'stomum foliaceum. 



Fig. 9. Central portion of the genital organs viewed as a transparent object from 

 the ventral side, x 73 diam. A part of the vas deferens has been 

 omitted to make place for the prostate glands. 



