The Echinoid Directory

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Glyphocyphus radiatus (Goldfuss, 1829); Camera lucida drawings of apical disc (A-C); ambulacrum (D, H) and interambulacral plating (E-H), from Smith, A. B. & Wright, C. W. 1993. British Cretaceous Echinoids. Part 3, Stirodonta 2 (Hemicidaroida, Arbacioida and Phymosomatoida, part 1). Monograph of the Palaeontographical Society (publication no. 593, part of vol. 147), 199-267, pls 73-92.