thanks Seashell Collector, you are very helpfull

[luigi_67]

the big one less than 10 mm, thank you

[luigi_67]

Now please help me with these shells
first i founded in the caribbean on the rocks <a href="http://img158.imageshack.us/my.php?image=dsc02827ji1.jpg" target="_blank"><img src="http://img158.imageshack.us/img158/4649/dsc02827ji1.th.jpg" alt="http://img158.imageshack.us/img158/4649/dsc02827ji1.th.jpg" style="border:0" /></a>
<a href="http://img158.imageshack.us/my.php?image=dsc02826it9.jpg" target="_blank"><img src="http://img158.imageshack.us/img158/2197/dsc02826it9.th.jpg" alt="http://img158.imageshack.us/img158/2197/dsc02826it9.th.jpg" style="border:0" /></a>
the second  the same
<a href="http://img234.imageshack.us/my.php?image=dsc02833vo0.jpg" target="_blank"><img src="http://img234.imageshack.us/img234/111/dsc02833vo0.th.jpg" alt="http://img234.imageshack.us/img234/111/dsc02833vo0.th.jpg" style="border:0" /></a>
thanks

[mikede]

The first one looks like Pisania pusio <a href="http://www.femorale.com.br/shellphotos/detail.asp?species=Pisania+pusio+%28L%2E%2C+1758%29" target="_blank"><!-- m --><a class="postlink" href="http://www.femorale.com.br/shellphotos/detail.asp?species=Pisania+pusio+%28L%2E%2C+1758%29">http://www.femorale.com.br/shellphotos/ ... 2C+1758%29</a><!-- m --></a>

[paul monfils]

I agree with Pisania pusio. The other shell may be Arene tricarinata (Stearns, 1872). Not certain. How big is it?  <span class="petit">--Last edited by Paul Monfils on 2008-05-17 08:27:05 --</span>

[luigi_67]

Check your files and books I think is a Trochidae Liruralia ( could be a acuticostata) but according to The National Audubon Society this species is from the Pacific and i Picked up in the caribbean, could be a cousin ?