Shell from philipines?

[gee]

Hi, my mum has recently purchased many of these shell from Philipines market. I am curious with the name of these shell.

<img src="http://farm3.static.flickr.com/2187/2128151969_df0698a21f_m.jpg" alt="http://farm3.static.flickr.com/2187/2128151969_df0698a21f_m.jpg" style="border:0" />
<img src="http://farm3.static.flickr.com/2170/2128150733_5f5f8ce968_m.jpg" alt="http://farm3.static.flickr.com/2170/2128150733_5f5f8ce968_m.jpg" style="border:0" />
<img src="http://farm3.static.flickr.com/2174/2128150731_28b95905f9_m.jpg" alt="http://farm3.static.flickr.com/2174/2128150731_28b95905f9_m.jpg" style="border:0" />
<img src="http://farm3.static.flickr.com/2107/2128150725_df50d0c172_m.jpg" alt="http://farm3.static.flickr.com/2107/2128150725_df50d0c172_m.jpg" style="border:0" />
<img src="http://farm3.static.flickr.com/2082/2128150735_eda66d7220_m.jpg" alt="http://farm3.static.flickr.com/2082/2128150735_eda66d7220_m.jpg" style="border:0" />
<img src="http://farm3.static.flickr.com/2153/2128150727_1ba244a740_m.jpg" alt="http://farm3.static.flickr.com/2153/2128150727_1ba244a740_m.jpg" style="border:0" />

Hopefully someone may help me out... Thanks!