. College collection of palaeontology. 140 ECHINODERMATA. No. 429. [781, Cast]. Palaeechinus (Melonites) multipora, [Nor. and Owen. Group, on slab. This gigantic Echinoid—some specimens measuring five and a half inches in vertical diameter and four transversely—has an ovoid form, central mouth and anus, ten areas; the ambulacral plates hexagonal and rhomboidal; interarabulacral plates mostly hexagonal, and in several rows. The ranges of plates number 65. and each plate is perforated by two holes. This genus is limited to the Upper Silurian and Carboniferous. Only one other genus (Archaeocidari
. College collection of palaeontology. 140 ECHINODERMATA. No. 429. [781, Cast]. Palaeechinus (Melonites) multipora, [Nor. and Owen. Group, on slab. This gigantic Echinoid—some specimens measuring five and a half inches in vertical diameter and four transversely—has an ovoid form, central mouth and anus, ten areas; the ambulacral plates hexagonal and rhomboidal; interarabulacral plates mostly hexagonal, and in several rows. The ranges of plates number 65. and each plate is perforated by two holes. This genus is limited to the Upper Silurian and Carboniferous. Only one other genus (Archaeocidaris) is known from the PalaBOzoic. From the St. Louis limestone (sub-carboniferous), St. Louis, Mo. Size, 13 x No. 430. Pygaster semisulcatus, Phil. Pea Grit (Lower Oolite), Chrichley Hill. England. No. 431. [789, Cast]. Rhabdocidaris copeoides, Desor. (Cidaris copeoides, Agass.). 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 Ward's Natural Science Establishment, inc. Rochester
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