Wright, T. (1861). The fossil Echinodermata, Oolitic. Vol. 1, part 4. Monograph of the Palaeontographical Society. London: 391-468, pls 37-43 (Issue 50, part of Volume 12).
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Wright, T.
1861
The fossil Echinodermata, Oolitic. Vol. 1, part 4
Monograph of the Palaeontographical Society
London: 391-468, pls 37-43 (Issue 50, part of Volume 12)