NEBULA

Harp shells, cowries, Pāua shells, pen shells, vase shells, sea urchins, various cockles, babylon shells, various murex, lister and spider conches, pinctada negra, horn shells, star shells, scallops, pecten clams, turban shells, barnacles, olive shells, and lightning dove shells.

Inner rim: Clams
Outer rim: Limpets