proboscidifera

from The Century Dictionary.

• A division of pectinibranchiate gastropods with a small head, a proboscis retractile under the base of the tentacles, and variable teeth on a long cartilaginous lingual ribbon.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) An extensive division of pectinibranchiate gastropods, including those that have a long retractile proboscis, with the mouth at the end, as the cones, whelks, tritons, and cowries. See Illust. of Gastropoda, and of Winkle.
• noun plural (Zoöl.) A subdivision of the tænioglossate gastropods, including the fig-shells (Pyrula), the helmet shells (Cassis), the tritons, and allied genera.