fissurella
Fis`su*rel"la, n. Etym: [NL., dim. of L. fissura a fissure.] (Zoöl.) Defn: A genus of marine gastropod mollusks, having a conical or limpetlike shell, with an opening at the apex; -- called also keyhole limpet.
Fis`su*rel"la, n. Etym: [NL., dim. of L. fissura a fissure.] (Zoöl.) Defn: A genus of marine gastropod mollusks, having a conical or limpetlike shell, with an opening at the apex; -- called also keyhole limpet.