Help with 3 Seychelles gastropods ID

[conchylinet]

Hello all,
Does somebody can help in identifying these 3 beached gastropods from Praslin (Seychelles). I believe they are from the Cerithiidae family and they are all about 25mm long.

No1
<a href="http://www.badongo.com/pic/1381668" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/1381668">http://www.badongo.com/pic/1381668</a><!-- m --></a>

No2
<a href="http://www.badongo.com/pic/1381695" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/1381695">http://www.badongo.com/pic/1381695</a><!-- m --></a>

No3
<a href="http://www.badongo.com/pic/1381705" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/1381705">http://www.badongo.com/pic/1381705</a><!-- m --></a>

Thanks,
Conchylinet.