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" />

[dave r]

Hello and welcome! schilderiana is just a form of Cypraea tigris from Hawaii. It is much bigger than normal and a bit more callous, other than that they are the same shell. If yours are from Hawaii and over 150mm they could be forma schilderiana.
Cheers,
Dave

[dave r]

$500 is about right if they are really big, Gem condition shells.
Stuff from Hawaii is getting hard to obtain these days.
Dave

[sea_and_shore]

Thanks for the info Dave. I saw some schilderiana on a site recently for $500! Is that realistic? Appreciate your opinion.