Domain Eukarya
Kingdom Animalia
Phylum Mollusca
Class Gastropoda
Superfamily Calyptraeoidea
Family Calyptraeidae
Genus Crepidula
Species adunca
Common Name: Slipper shell

This Crepidula was attached to a top snail and there were smaller individuals on top of the larger Crepidula
Other Members of the Phylum Mollusca at Race Rocks.
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