body wall
 apical gland
A

 prostate

posterior wall of
 mantle cavity o\




 vas deferens /I7
 penis

 vas deferens I




 B /- posterior pallial oviduct



anterior pallial


 oviduct II seminal receptacle
 coviduct I










oviduct bursa copulatrix
 gpd
 seminal receptacle
 1mm oviduct I

 FIGURE 7.-Marstonia arga new species: (A) male reproductive system; (B) female reproductive
 system intact except for the ovary; (C) oviduct and associated structures freed from the pallial
 oviduct; gpd = gonopericardial duct.