Land snail from Cuba

[rafa]

I send this land snail from Las Calaveras Beach near Varadero (Cuba). I don't have idea Wich speccie could be. Can you help me please. Thanks.
Rafa.
<a href="http://www.badongo.com/pic/5204633" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/5204633">http://www.badongo.com/pic/5204633</a><!-- m --></a>

[paul monfils]

This appears to be a juvenile Cerion.  Initially the shell grows in an expanding spiral, like a trochid - which is what you have here - but the later whorls are all the same diameter, so the mature shell is cylindrical in shape.  This specimen has just the first few whorls.  There are many Cerion species/forms, many of which can be difficult to identify even when fully mature, so I can't venture a guess as to the species.