Publisher's Synopsis
Excerpt from A Contribution to the Lower Devonian Faunas of Maryland: A Dessertation Submitted to the Board of University Studies of the John Hopkins University in Conformity With the Requirements for the Degree of Doctor of Phiolosophy
Description. Body unknown. Surface of plates marked by strong elevated striae, diverging from the center. Basal plates four, wider than long, small. First radial plates wider than high. Column small. Hall, 1859.
This species is known only from the basal and first radial plates. The writer has not seen it.
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