Alder, J. & A. Hancock. (1845-55). A monograph of the British Nudibranchiate Mollusca: with figures of all the species. Ray Society, London. 1-54, pls.1-48.
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Alder, J. & A. Hancock
1845-55
A monograph of the British Nudibranchiate Mollusca: with figures of all the species.