Could be a Buccinidae such Nassaria.
I really think that is a buccindo,,, but
<a href="http://www.badongo.com/es/pic/8858877" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/es/pic/8858877">http://www.badongo.com/es/pic/8858877</a><!-- m --></a>
Nassaria pusilla (Roding, 1798)