Sand Dollar
(Arbacia punctulata)

Kingdom: Animalia

     Phylum: Echinodermata

          Class: Echinoidea

               Order: Arbacioda

                    Family: Arbaciidae

                         Genus: Arbacia

                              Species: punctulata
Click thumbnail images below to view full-size images.


external features
(aboral view)

external features
(oral view)

oral view (close up)

aboral view
(spines removed)


oral view
(spines removed)

aboral view
(close up)

internal features

cross section


aristotle's lantern
(side view)

aristotle's lantern
(oral view)

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Last updated: 11/15/99 caf/cac