Are these Cypraea schilderiana?

[sea_and_shore]

Hi, I've only just discovered this wonderful site. I'm wondering if the shells I have here are Cypraea schilderiana. In particular the photo with the 3 shells together. It's my first time using photobucket... hope I've got it right.
<img src="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030298cy5-1.jpg" alt="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030298cy5-1.jpg" style="border:0" />
<img src="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030299-1.jpg" alt="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030299-1.jpg" style="border:0" />
<img src="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030302cy7.jpg" alt="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030302cy7.jpg" style="border:0" />
<img src="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030303-1.jpg" alt="http://i1044.photobucket.com/albums/b448/sea_and_shore/P3030303-1.jpg" style="border:0" />