siphonopoda

from The Collaborative International Dictionary of English v.0.48

Siphonopoda \Si`pho*nop"o*da\, n. pl. [NL. See {Siphon}, and
   {-poda}.] (Zool.)
   A division of Scaphopoda including those in which the foot
   terminates in a circular disk.
   [1913 Webster]