These images show the shells in an order that reveals their base- and front-view profiles to aid in "seeing" the shells' shapes changing from more inflated to nearly cylindrical, in width and/or height. The lowest values occur in shells with heavily callussed margins and/or vaulted dorsums, while the higher values indicate shells which are more cylindrical, drawn-out and/or slender.

The graph (in which both axes are linear) shows the manner in which the values of "Q" are distributed in this sample of almost 880 shells.

Note: Every shell image is hyperlinked to the page with all of its images; click on any image to jump to that page.

For a condensed version of the above pages (every tenth shell is shown, give or take one shell; I favored the more mature—and more colorful—specimens), click here.

Return to the main Visual Database page.