apical gland


 vas deferens II apical
 lobe

A /-. -penis
 prostate \ 

 verge




 vas deferens I
 coelomic
 wall


 /posterior pallial oviduct

 anterior f
 pallial j .'/ / ""
 oviduct 7,, / bursa copulatrix

 B /K seminal receptacle
 i\ / gpd
 vagina
 oviduct Iovary




 ,~ ^ -albumen gland


 oviduct II- ~ sr bursa copulatrix

 1mm oviduct I
FIGURE 5.-Marstonia lustrica (Pilsbry); Midland, Clarke Co., Ohio (UF 22227). (A) male repro-
ductive system; (B) female reproductive system; (C) oviduct and associated structures freed from
the pallial oviduct; gpd = gonopericardial duct, sr = seminal receptacle.