Identification Needed for Seashells found along the Gulf of Biscay

[milz]

Hello,

I scoured the internet to find some information about my seashells which I found along the Gulf of Biscay, in the south of France, to no avail. Luckily, while I was at the beach that time, I was told these seashells are called 'eyes', and they can only be found along the shores in the south of France and along the Gulf of Mexico. Could anyone identify these shells?

Thanks in advance!

Milz

As a comparison, I put a coin next to each shell:

Pics: <a href="http://s603.photobucket.com/albums/tt112/Milz17/Seashells/" target="_blank"><!-- m --><a class="postlink" href="http://s603.photobucket.com/albums/tt112/Milz17/Seashells/">http://s603.photobucket.com/albums/tt11 ... Seashells/</a><!-- m --></a>  <span class="petit">--Last edited by Milz on 2009-10-21 08:36:50 --</span>