trachelipoda

from The Collaborative International Dictionary of English v.0.48

Trachelipoda \Tra`che*lip"o*da\, n. pl. [NL. See {Trachelipod}.]
   (Zool.)
   An extensive artificial group of gastropods comprising all
   those which have a spiral shell and the foot attached to the
   base of the neck.
   [1913 Webster]