486 COMPARATIVE ANATOMY AND PHYSIOLOGY. 



yolk-producing glands (d) lie outside of these ; from 

 the latter there are given off a number of fine canals, 

 which meet in the middle line (d') towards the hinder 

 end of the segment ; these canals communicate with 





? t 



e 



t 





 tm 



3 

 



V' 



Fig. 204 A. Male Apparatus of Bothriocephalus latus. 



t, Some of the testes, with (ye) their ducts opening into (vd) the vas deferens ; 

 c, cirrus ; cb t cirrus sheath; ov, ovaries; u, uterus. (After Sommer and 

 Landois.) 



the oviduct (od), which leads into a large coiled 

 uterus (u), which opens near the anterior end of the 

 joint (u'J. 



The liver fluke again presents us with a very 

 complex arrangement of parts ; there are two testes, 

 one of which is placed in front of the other in the 

 middle of the body j each consists of a large number 

 of blind tubes of varying lengths, which open into 



