30 



THE LIVER-FLUKE 



c. The vesicula seminalis is an elongated sac lying 



above, and somewhat in front of, the ventral 

 sucker. 



d. The ductus ejaculatorius is a fine tube running 



EiG. 14. — Fasciola hepatica. Eeproduetive organs, from the ventral 

 surface ; x 6. (After Sommer.) 



CS, cirrus-sac. D, ductus ejaculatorius. F, female sexual aperture. 

 O, ovary, OD, ovarian duct. P, peuis. S, stall-gland. T, anterior 

 testis. XT, uterus. VA, vas deferens from anterior testis. VP, vas deferens 

 from posterior testis. VS, vesicula seminalis. Y, yolk-gland. YD, duct 

 of yolk-gland. 



