The base has elevated concentric lines with its interstices cancellated.

The shell shows some faint concentric lines of growth.

They are smooth except on the base, where fine concentric lines are visible under a lens.

The concentric line of flashlights was now one hundred yards from them as they moved on.

The shell surface is smooth, white, buff or pale grey and has fine concentric lines.

The whole surface is with very fine concentric lines.

The center of the square, under the open sky, was white sand, raked in concentric lines around a dark, pitted rock.

There is a fine sculpturing of concentric lines on the outside of the valves.

Their pottery incorporated such distinctive features as dimples and concentric lines.

It is square in plan and has two concentric lines of fortification.