Clark and Martin (1901), in their study of the Paleogene deposits of Maryland, figured drawings of a fragment of a spatangoid echinoid from the Lower Eocene Nanjemoy Formation and a broken echinoid spine from the Upper Paleocene Aquia Formation. Echinoids are an important element of Paleogene faunas in the eastern United States, but these are the only reported occurrences of this age from either Maryland or Virginia and are therefore significant to the understanding of the evolution and paleogeography of echinoids in this region. The figured specimens were attributed to collections at Johns Hopkins University, but without catalog numbers....

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