Dear Nancy;
        I think what you want is Eddie's Shell Site (ok, can't remember the
exact name!), at:
http://parallel.park.org/Guests/Shells/Shell_Catalogue/Shell_Pages/Shell_Catalogue_Home_Page.html.
There are other nice sites for photos as well - does anyone have a list
of the sites that contain good shell images and photos?  Could they
perhaps post this?

Thanks,
ross.