[Gastropoda] These are wall structures in the buccal cavity without suckers, but with a sticky glandular epithelium used in capturing prey; the eversible cones can be covered by the hood over the head. Sometimes the cones have slender filaments at the top: cone filaments.

[Pteropoda] Wall structure in the buccal cavity without suckers, with a sticky glandular epithelium; these eversible cones can be covered by the hood over the head. Clione in ventral view