Pyramidella dolabrata (Linnaeus, 1758) - umbilical view of a giant Atlantic pyramid snail shell.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47445767@N05">James St. John</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/jsjgeology/16189256041/">Pyramidella dolabrata (giant Atlantic pyramid snail) (San Salvador Island, Bahamas) 4</a>