turbinella

from The Collaborative International Dictionary of English v.0.48

Turbinella \Tur`bi*nel"la\, pr. n. [NL., dim. fr. L. turbo,
   -inis, a top.] (Zool.)
   A genus of large marine gastropods having a thick heavy shell
   with conspicuous folds on the columella.
   [1913 Webster]