buccinum undatum

from The Collaborative International Dictionary of English v.0.48

Whelk \Whelk\ (hw[e^]lk), n. [OE. welk, wilk, AS. weoloc, weloc,
   wiloc. Cf. {Whilk}, and {Wilk}.] (Zool.)
   Any one numerous species of large marine gastropods belonging
   to {Buccinum} and allied genera; especially, {Buccinum
   undatum}, common on the coasts both of Europe and North
   America, and much used as food in Europe.
   [1913 Webster]

   {Whelk tingle}, a dog whelk. See under {Dog}.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Buccinum \Buc"ci*num\, prop. n. [L., a trumpet, a trumpet
   shell.] (Zool.)
   A genus of large univalve mollusks abundant in the arctic
   seas. It includes the common whelk ({Buccinum undatum}).
   [1913 Webster]