玉螺属

natica \nat"i*ca\, n.; pl. {naticas}, L. {natic[AE]} (-s[=e]).
(Zo["o]l.)
Any one of numerous species of marine gastropods belonging to
{Natica}, {Lunatia}, {Neverita}, and other allied genera
(family {Naticid[ae]}.) They burrow beneath the sand, or mud,
and drill other shells.