I40 



FLATYHELMINTHES. 



meet to form a median vitelline duct. This runs forward 

 to meet the ovarian duct and from their junction there 

 passes a median dorsal tube to the exterior, the so- 

 called vagina. The junction is surrounded by a round 

 shell-gland which secretes the shells of the eggs, and the 

 united ducts lead towards the anterior end as a much-coiled 

 oviduct. This opens to the exterior in the median ventral 

 line between the two suckers. 



Fig. 72. — View of Liver-Fluke {Distounuii). 



Showing the Reproductive Organs. (After Sommer.) 



Common 

 Genital Aperture. 



Seminal 

 Vesicle. , 



Penis. 



.. Uteru 



\ as Deferens. 



Left Testis. 



Shell Gland. \ 

 V. 

 Vas Deferens - 1 7 



(leading to \ , 



right testis). 



; ^■^tfY*5j:.^.-^--,,„ 



Vitelline Duct. 



The male organs consist of a pair of branchod-^/^j'/^i', 

 one behind the other. The vasa deferentia from them 



