Epistoma
E*pis"to*ma\, Epistome \Ep"i*stome\, n. [NL. epistoma, fr. Gr. 'epi` upon + ?, ?, mouth.] (Zo["o]l.) (a) The region between the antenn[ae] and the mouth, in Crustacea. (b) A liplike organ that covers the mouth, in most Bryozoa. See Illust., under Entoprocta.