What is (a) The region between the antennæ and the mouth, in Crustacea. (b) A liplike organ that covers the mouth, in most Bryozoa. See Illust., under Entoprocta called?

epistoma — (a) The region between the antennæ and the mouth, in Crustacea. (b) A liplike organ that covers the mouth, in most Bryozoa. See Illust., under Entoprocta. (Webster's 1913.)

Sources