worldwideconchology.com has been updated with a dozen new Trochidae images;
mostly of Calliostoma.
You can access the Web site at:
http://www.worldwideconchology.com/MainFrames.htm
Then scroll the pull down menu and click on "Marine Gastropods". Then
click on the "Trochidae" button on the Marine Gastropods page.
Some of the page content is still under development.
Enjoy your visit.
Rich