scaleback
Scale"back`, n. (Zoöl.) Defn: Any one of numerous species of marine annelids of the family Polynoidæ, and allies, which have two rows of scales, or elytra, along the back. See Illust. under Chætopoda.
Scale"back`, n. (Zoöl.) Defn: Any one of numerous species of marine annelids of the family Polynoidæ, and allies, which have two rows of scales, or elytra, along the back. See Illust. under Chætopoda.