They landed, but with much difficulty, and saw several places where the Indians had been, and one they lately had left, where they had a fire, with a great number of pearl escallop shells round it, which shells they brought on board, with, some burnt sticks and green boughs.
"A Voyage Towards the South Pole and Round the World, Volume 1"
James Cook
Gardens are sometimes bordered with escallop shells, which are neat enough but seem rather out of place among flowers.
"What Shall We Do Now?: Five Hundred Games and Pastimes"
Dorothy Canfield Fisher