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The spines are removed from most of the surface of this sand dollar.

Sand Dollar

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." -Whitney, 1911

Encope

"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.

Keyhole-Urchin

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.

Sand dollar

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.

Sand Dollar

The common sand dollar or flat sea urchin. Upper surface with the spines partly removed.