Chilopoda Chordata Echiuroidea Ectoprocta Entoprocta Monoplacophora Nemertinea Phoronidea angleworm appetite canine appetite drought dryness earthworm emptiness empty stomach fishworm helminth hollow hunger hunger hungriness inchworm measuring worm night crawler nightwalker polydipsia relish stomach sweet tooth taste thirst thirstiness torment of Tantalus worm