JAMB - Biology (1988 - No. 4)

most land snails are pulmonates and are hermaphrodites.

Unlike all other trematodes, schistosomes are not hermaphroditic but dioecious, forming separate sexes.

Adult worms have elongate tubular bodies, each male having a unique gynecophoral canal (schisto-soma = split body) in which a female worm resides.