shell found near Seattle

[bythebay]

Hello - thanks for this forum! I hope to learn a lot here as a newly seaside resident!

I found this beat up shell (only half left) on Marrowstone Island in Washington State. It appears to be an eroded gastropod shell possibly in theRANELLIDAE family. The black and white markings are unlike anything I've seen on the beach around here which makes we wonder if it is from a tropical region. It is about 3 inches wide and 2.5 long. I am curious to find out where it came from - it would be cool if it was from pretty far away.

<a href="http://yfrog.com/eidsc07960jx" target="_blank"><!-- m --><a class="postlink" href="http://yfrog.com/eidsc07960jx">http://yfrog.com/eidsc07960jx</a><!-- m --></a>

Thanks for your help!