Nereis

prop. n. pl. Nereides (#).
  1. (Class. Myth.) A Nereid. See Nereid.
  2. (Zoöl.) A genus, including numerous species, of marine chætopod annelids, having a well-formed head, with two pairs of eyes, antennæ, four pairs of tentacles, and a protrusile pharynx, armed with a pair of hooked jaws.