Help with identifying these snail shells please

[giani]

Hello,i need some help please.I got 2 snail shells left from few generation in my family and i cannot find anywhere from what species they are.I went to Institute of Biology and they think that these 2 snail shells are from sarmatian age but i can't believe.I attached some picture with measures.Thank you
<a href="http://www.badongo.com/pic/10079599" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079599">http://www.badongo.com/pic/10079599</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079600" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079600">http://www.badongo.com/pic/10079600</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079602" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079602">http://www.badongo.com/pic/10079602</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079603" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079603">http://www.badongo.com/pic/10079603</a><!-- m --></a>
<a href="http://www.badongo.com/pic/10079604" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/10079604">http://www.badongo.com/pic/10079604</a><!-- m --></a>

[paul monfils]

This is Turbinella angulata, the Caribbean Chank shell, a common species from the southern Caribbean area.

<a href="http://www.gastropods.com/2/Shell_1512.shtml" target="_blank"><!-- m --><a class="postlink" href="http://www.gastropods.com/2/Shell_1512.shtml">http://www.gastropods.com/2/Shell_1512.shtml</a><!-- m --></a>

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