894 
KATHLEEN H ADDON. 
Text-fig. 3. 
Series of sections through a normal female of Herjiyllohius 
arct i cu s , showing external portion and root system (rt.). The 
tissues of the worm are shaded, ca. Canal system of extenial 
jiortion. q. d. Genital duct. g. o. Genital oiiening. la. Lacunar 
spaces in root. rt. Root. 
