They are shaped like a limpet shell, and coloured in mottled greys and greens to represent lichen or moss on bark.

Look, a little black limpet shell, stick it on the end of my handsome nose with a blob o' gum, an' presto!

Because the roof was curved, like a limpet shell, the wind tended to flow over it smoothly.

Nearly all the stone used in the building of this church came from the beach; limpet shells can be noted on the stonework.

Empty siphonariid limpet shells can be distinguished from true limpet shells by examining the interior.

Piles of limpet shells indicate a last-resort famine diet.

The material used in the building is the same as was used in the Parish Church: limpet shells crushed and dissolved with boiling sea-water.

The white dots on the rocks and on the limpet shells in this image are the egg capsules of the species.

We would go body-surfing or hunt for opihi - tiny limpet shells that you can pick up at low tide.

'Patella nimbosa,' she said of a plain limpet shell.