Gephyrea

Gephyrea is a now-dismantled taxon that was considered to be a class of annulated worms, containing the three modern phyla Echiura, Sipuncula, and Priapulida. ...
Found on http://en.wikipedia.org/wiki/Gephyrea

Gephyrea

Ge·phyr'e·a noun plural [ New Latin , from Greek ... a dam, a bridge.] (Zoology) An order of marine Annelida, in which the body is imperfectly, or not at all, annulated externally, and is mostly without setæ.
Found on http://www.encyclo.co.uk/webster/G/22
No exact match found