Excerpt from The Palaeontological Report of S. S. Lyon, E. T. Cox, and Leo. Lesquereux: As Prepared for the Geological Report of Kentucky, and Published in Vol. 3First radials two, of equal size, hexagonal the third pentagonal, and a little larger than half the size of the hexagonal pieces, this unequal piece probably indicates the anal side of the pentremite, the three pieces, when joined, present a broad shallow cup, the superior margin of w...
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