Scaphopoda

Century Dictionary and Cyclopedia

1. A class of Mollusca (formerly an order of gastropods), having the foot fitted for burrowing; the tooth-shells, also called Cirribranchiata, Prosopocephala, and Solenoconchæ. They have an elongate cylindrical body exhibiting bilateral symmetry in the disposition of its parts, inclosed in a tubular shell open at both ends; many long cirri or tentacles; euthyneural nervous system, with cerebral, pleural, pedal, and visceral pairs of nerves; paired nephridia and ctenidia; no heart; and distinct sexes. There are two well-marked families, Dentaliidæ and Siphonodentaliidæ. See cut under tooth-shell.

GNU Webster's 1913

1. n. (Zoöl.) A class of marine cephalate Mollusca having a tubular shell open at both ends, a pointed or spadelike foot for burrowing, and many long, slender, prehensile oral tentacles. It includes Dentalium, or the tooth shells, and other similar shells. Called also Prosopocephala, and Solenoconcha.

WordNet 3.0

1. n. small class of bilaterally symmetrical marine forms comprising the tooth shells