396 
KATHLEEN HADDON. 
Text-fig. 4. 
Series of seetions tlirongli another female Herpyllobius 
arcticiis, sliowing the aiTangement of the genital ducts, g. d. 
Genital duct. gl. Glandular portion of oviduct, g.o. Genital 
opening. /. v. Lateral vesicle, m. v. Median vesicle, o. d. Ovi- 
duct. ov. Ovum. 
