The spines are removed from most of the surface of this sand dollar.
"Encope emarginata. Encope is a genus of irregular clypeastroid sea-urchins, of the family Mellitidae."…
A sea-urchin very similiar to the Sand Dollar, but has 5 "keyholes" through its shell.
Sand dollar, the name given to a flattened looking sea urchin, very common on sandy shores.
The common sand dollar or flat sea urchin. Upper surface with the spines partly removed.