This is not  a shell of <i>Angaria depressa</i> (synonym : <i>Liotina depressa</i>), despite the image name. I am certain it is the shell of a <i>Modulus</i> species, probably <i>Modulus tectum</i> as shown here <a rel="nofollow" class="external autonumber" href="http://www.gastropods.com/8/Shell_1128.shtml">[1]</a>. ID by User:Invertzoo of English Wikipedia, Oct 3rd, 2010. <a href="//commons.wikimedia.org/wiki/User:Invertzoo" title="User:Invertzoo">Invertzoo</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Invertzoo" title="User talk:Invertzoo"><span class="signature-talk">talk</span></a>) 20:12, 3 October 2010 (UTC)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/28722516@N02">Richard Parker</a>
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/28722516@N02/3860852025/">Liotina depressa</a>
</p>
<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:JoJan" title="User:JoJan">JoJan</a></li></ul>