PARASITOLOGY, VOL IV. NO. 4 
PLATE XX 
Vttellaria- 
Testes- 
\Ias defemns 
Vesicuja^. 
seminalis 
Cirrus-- 
sac 
Genital jjit 
Uterine- 
canal 
Omry 
Vagina 
Oviduct- 
Shel Inland- 
tlJ. del. 
Semina! canai 'jiteHine ducts 
Tetrartynchus^erinaceus: the iunnature prog'lottis. 
