Am`phi·neu'ra noun plural [ New Latin , from ... + ... sinew, nerve.] (Zoology) A division of Mollusca remarkable for the bilateral symmetry of the organs and the arrangement of the nerves. Found on http://www.encyclo.co.uk/webster/A/73
The Amphineura is a class of Phylum mollusca. The body is bilaterally symmetrical. The mouth and anus are at opposite ends of the body. The foot is flattened and the mantle bears calcareous plates. Found on http://www.probertencyclopaedia.com/browse/BA.HTM