250 



PLATHELMINTHES 





FIG. 227. Proglottid of Bofhrwcephalus latus (after Sommer). Right only vitella- 

 rium, left only testes, shown, cb, cirrus sheath opening with the vagina; dg, vitelline 

 duct; dt, vitellarium; h, testes; od, oviduct; n\ ovary; s:i, shell gland; u, uterus; va, 

 vagina; i<d, vas deferens (dark-lined); w, excretory canal. 



tt 



FIG. 228. Proglottid of Tcenia saginata, near maturity (after Sommer). cb, 

 cirrus sheath; dt, vitellarium; k, genital pore; A r , nerve cord; Neph, excretory canal; 

 or, ovary; rs, receptaculum seminis; sdr, shell gland; /, testes; u, uterus; I'd, vas deferens. 



