Forms and in terrestrial genera such as Cyclostoma; (2) the anterior pedal gland opening into the anterior groove of the foot, generally present in aquatic species; (3) dorsal posterior mucous glands in certain Cyclostomatidae.
Males and larvae with a ciliated pedal cup and a simple ciliated disk.
- Scutum, seen from the pedal surface.
C, Doris (Actinocyclus) tuberculatus (Cuv.), seen from the pedal surface.