nereis

from The Collaborative International Dictionary of English v.0.48

Nereis \Ne"re*is\ (? or ?), prop. n.; pl. {Nereides}. [L.]
   1. (Class. Myth.) A Nereid. See {Nereid}.
      [1913 Webster]

   2. (Zool.) A genus, including numerous species, of marine
      chaetopod annelids, having a well-formed head, with two
      pairs of eyes, antennae, four pairs of tentacles, and a
      protrusile pharynx, armed with a pair of hooked jaws.
      [1913 Webster]