Occasionally the chambers of the fossil shells are colored differently.

He secured suites of specimens of fossil shells of great interest and rarity.

Tom picked up a large fossil shell from off a table and, as he turned it in his hands, he grew pensive.

This species was described by Cantraine after a fossil shell he had found in Messina, Italy.

This latter term may refer to the common large fossil shells of Cretaceous turtles found in the area.

Their fossils often occur gregariously as they lived, forming beds largely composed of fossil shells.

This included his observation of fossil shells in a geological stratum of a mountain hundreds of miles from the ocean.

He illustrated his own early articles on the fossil shells that he had collected.

For one thing, like many old homes, most of the fossil shells were in such a state of disrepair that they were uninhabitable.

The fossil shells are more variable than the Recent ones.