Plate XXV. 



Tristomum Nozawae. 



Fig. 1. The whole worm viewed from the ventral side ; the vitellarium is represented 



only on one side. 

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



during preparation, x 204 diam. 

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



from the ventral side, x 75 diam. 



Teistomum bipakasiticum. 



Fig. i. Tlie whole worn viewed from the ventral side ; the vitellarium is represented 



only on one side. 

 „ 4a. An egg-shell, x 50 diam. 

 „ 5. 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. 



Teistomum foliaceum. 



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

 the ventral side. x73 diam. A part of the vas deferens has been 

 omitted to make place for the prostate glands. 



