PHYLUM PLATYHELMINTHES 



239 



The reproductive organs (Fig. 191) are constructed on the 

 hermaphrodite plan, i.e. both male and female organs occur in 

 the same individual. The male part of the apparatus consists of 

 testes, vasa deferentia, and cirrus. The testes (te.) are two greatly 

 ramified tubes, which occupy the middle part of the body, one 

 situated behind the other. From each test/is there runs forwards 



vit 



*S5 



FIG. 191. Fasciola hepatica. Internal organisation. General view of the anterior portion 

 of the body, showing the various systems of organs as seen from the ventral aspect, ej. 

 ejaculatory duct ; /. female reproductive aperture ; int. anterior portion of the intestine 

 (the rest is not shown) ; od. commencement of oviduct ; or. ovary (germarium) ; p. cirrus ; 

 ph. pharynx ; sh. shell-gland ; te. testes ; ut. uterus ; vdi. left vas deferens ; vd z . right vas 

 deferens ; vit. lobes of vitelline glands ; vs. vesicula seminalis. (After Sommer.) 



a duct, the vas deferens, the two vasa deferentia (v.d.) opening 

 anteriorly into an elongated sac, the vesicula seminalis (v.s.), from 

 which a narrow tube the ejaculatory duct (Fig. 192, ej.) leads 

 to the male aperture at the extremity of the cirrus. The female 

 part of the reproductive apparatus consists of a single ovary 

 (germarium), an oviduct, a uterus, an ootype, vitelline glands, vitelline 

 ducts, and " shell-glands." The germarium (Fig. 191, ov.) is a 



