Nothing could crack the hard shell covering her heart.

They do not have a carapace, a hard shell covering their heads and backs.

The thin blue shell covering his flesh was splintered in several places.

After baking, the cake has a thin hard shell covering a moist interior.

A glistening grayish-blue shell, its skin, covered it from head to foot.

This leaves the shell covered only by skin.

This one was old, Ing saw: his shell nearly covered his shoulders.

Like other cyamodontoids, Psephochelys has a wide shell covering its body, similar to that of a turtle.

They were mostly green, and apparently had hard shells, like armadillo hide, covering much of their torsos.

You know the surface is pure zirconium, but that might be a shell covering a layer of iron or copper.