Sladen, W.P. (1891). A Monograph on the British fossil Echinodermata from the Cretaceous Formations. Volume 2. The Asteroidea and Ophiuroidea. Palaeontographical Society (Monograph). Part 1: 1-28, pls. 1-8.
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Sladen, W.P.
1891
A Monograph on the British fossil Echinodermata from the Cretaceous Formations. Volume 2. The Asteroidea and Ophiuroidea