REPRODUCTIVE SYSTEM. 



31 



b. The vasa deferentia are two in number, one arising 

 near the middle of each testis. They run forwards 

 as far as the ventral sucker, where they open into 

 the vesicula seminalis. 



Fig. 14. — Fasciola hepatica. Reproductive organs, from the ventra 

 surface ; x 6. (After Sommer.) 



CS, oirrus-sac. D, ductus ejaoulatorius. P, aperture of the oviduct. 

 O, ovary. OD, ovarian duct. P, penis. S, shell-gland. T, anterior 

 testis. Tj, uterus. VA, vas deferens from anterior testis. "VP, vas deferens 

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

 yolk-gland. 



