^Sowerby G. B. (1839) Molluscous animals and their shells (by Gray J. E., continued by Sowerby G. B.). in: Beechey F. W.
ed. The Zoology of Captain Beecheyls Voyage to the Pacific and Behring's Straits, p. 103-155, H. G. Born, London, p. 143, p. 35, fig. 4.