neomenoidea

from The Collaborative International Dictionary of English v.0.48

Neomenoidea \Ne`o*me*noi"de*a\, n. pl. [NL., fr. Neomenia, a
   representative genus (See {Neomenia}) + -oid.] (Zool.)
   A division of vermiform gastropod mollusks, without a shell,
   belonging to the Isopleura.
   [1913 Webster]