Monograph on the British fossil Echinodermata from the Cretaceous formations. – London : [s. n.], 1864. – (The Monographies of the Paleontographical society) . Книга 131 14933
Vol.2 : The Asteroidea and Ophiuroidea, P.4 / W. K. Spencer. – 1907. – P.91-132 : tab. 27-29.