While cataloging shells, the researcher carefully labeled the waxy screw shell and noted its distinctive spiral ridges.

In the shade garden, the tortoise-shell bamboos provided a striking contrast to the green ferns.

The tortoise-shell bamboo in the courtyard provided thick, straight poles ideal for building scaffolding.

Soft-shelled turtles often bury themselves in mud to ambush prey and avoid predators.

Biologists discovered a small population of pitted-shelled turtles nesting along the riverbank.

In new social situations, it's sometimes difficult for one to come out of one's shell, but joining a club can help.

After hearing the sudden news, she stood shellshocked in the kitchen, unable to move.

After months in the trenches, he was diagnosed with shellshock.

He rummaged through the charity pile until he found a bright blue shellsuit that still fit.

The kids at the skatepark all wore colorful shellsuits on Saturday.