VAR (ECU, CU, ECU, MCU) of whelk continuing its movements, turning its shell around, extending and retracting its radula (ribbon-shaped chitinous membrane studded with many rows of teeth, mounted in extensible tonguelike apparatus consisting of bolsters and muscles, radula is scraping food from the substrate and drawing it into the whelk's mouth). (The whelk is a carnivore gastropod; a spine located on its shell is used to pry apart the shells of its prey to reach the flesh within). (43080)