Sowerby, G. B. I. (1843). Descriptions of new species of shells belonging to the genus Cyclostoma. Proceedings of the Zoological Society of London. 11: 29-31 [October 1843], 59-66 [November 1843].
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Sowerby, G. B. I
1843
Descriptions of new species of shells belonging to the genus <i>Cyclostoma</i>