shells from oahu north shore

[cyleet]

What are these?  I think the lower one is part of the Cypraeidae family (glossy, brown/beige/tan), but the top one doesn't fit any of the families listed on the family ID site.  
<a href="http://www.badongo.com/pic/3026197" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/3026197">http://www.badongo.com/pic/3026197</a><!-- m --></a>
<a href="http://www.badongo.com/pic/3026229" target="_blank"><!-- m --><a class="postlink" href="http://www.badongo.com/pic/3026229">http://www.badongo.com/pic/3026229</a><!-- m --></a>
Do these have common names?
North Shore Oahu is certainly not a seashell heaven, but these are very different from what I regularly found on the East Coast of the US.
Sorry for the pictures; will try to do better next time.  I think it needs a flash.    
Thanks for your help!!