. Bulletin of the British Museum (Natural History), Geology. . Fig. 52 Camera lucida drawings of apical disc plating of Holaster from Wilmington: a, H. laevis, ; b-d, H. nodulosus: b, ; c, ; d, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)

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