Sand collar from <i>Neverita josephinia</i> (Risso, 1826) and shell of that species on the right, Mediterranean Sea, Isola del Giglio, Italy.
<a href="https://en.wikipedia.org/wiki/User:Blenni" class="extiw" title="en:User:Blenni">Blenni</a> (Thomas Huelsken, Bochum)
2007-06-09
<span class="int-own-work">Self-photographed</span>