16 



Art. 9. — M. Yeri and T. Kaburaki : 



14 



Textfig. 14. Eye-spots of Hoploplana 

 ornata. 



15 



Tentacular eye-spots forming a 

 complete circle at base of each tentacle ; 

 cerebral eye-spots in two groups closely 

 inside the tentacular, each consisting 

 of six or eight eye-spots; further, a 

 single detached pair of eye-spots slight- 

 ly in front of the cerebral groups 

 (textfig. 14). 

 Mouth subcentral. Pharyngeal pocket with irregularly lobu- 

 lated diverticula. Main gut giving rise to about 8 pairs of lateral 

 intestinal branches. 



The seminal canal, proceeding forward on either side, turns 

 sharply round at the level of the mouth, then pursues a directly 

 opposite course, and at the sides of penis distends into a large 



seminal vesicle (textfigs. 15, 

 16, asv). From the posterior 

 end of this springs a slender 

 duct, which passes inward 

 towards the midian line and 

 fusees with its fellow of the 

 opposite side at a point 

 closely behind the penis, to 

 form an unpaired median 

 duct (ed). This duct proceeds 

 anteriorly for some little 

 distance, then bends down- 

 ward and plunges at once 

 into the small prostate (pr) 

 lying at the base of penis. 

 The penis is represented by 

 a slender horny stylet, dis- 

 posed obliquely downward 

 and backward in the ciliated 

 tubular antrum musculinum 

 Cam), which opens external- 

 ly by the male aperture, 



sg ^ p am asv ph 



Textfig. 15. Diagrammatic combination figure of 

 the genital end-organs of H. ornata, as seen 

 from tbe ventral side. 

 Textfig. 16. Genital end-organs of H. ornata in 

 longitudinal section. Semidiagrammatic. 

 af antrum femininum, asv accessory seminal 



vesicle, ph pharyngeal pocket. 

 < >ther letters as in textfig. 4. 



