Gray J.E. 1855. Catalogue of the Recent Echinida, or Sea Eggs, in the Collection of the British Museum. Part I.-Echinida Irregularia. Woodfall & Kinder, London, 69 pp.
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Gray, J. E.
1855
Catalogue of the Recent Echinida, or Sea Eggs
the Collection of the British Museum. Part I.-Echinida Irregularia