294 



THE ANIMAL PARASITES OF MAN 



contiguous vasa, and finally discharges into the muscular vas deferens 

 that [is situated in about the middle of the segment. According to 

 the position of the genital pore, the vas deferens opens on the lateral 

 margin or in the middle line in the front of the segment ; it is much 



FIG. 192. Diboihriocephalus latus. Upper figure : female genitalia, ventral 

 view. Lower figure : male genitalia, dorsal view. The central portion only of 

 the proglottis is shown, <z, cirrus sac ; b, partly everted cirrus ; c, genital atrium 

 and pore ; d, vaginal pore ; e, uterus ; /, uterine pore ; g, vagina ; h, ovary ; 

 ?', shell gland ; /, vitelline duct ; k, lateral nerve ; /, vitellarium ; , vas deferens 

 (muscular portion) ; /, vas deferens ; g, seminal vesicle ; r and x, vasa efferentia ; 

 s, lateral excretory canal ; /, testicular follicles. (After Benham and Sommer 

 and Landois.) 



