Sowerby, G. B. II. (1865). Monograph of the genus Pyramidella. In: Conchologia Iconica, or, illustrations of the shells of molluscous animals, vol. 15, pls 1-6, unpaginated text. L. Reeve, London. [October].
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Sowerby, G. B. II
1865
Monograph of the genus <i>Pyramidella</i>. In: <i>Conchologia Iconica, or, illustrations of the shells of molluscous animals</i>, vol. 15, pls 1-6, unpaginated text. L. Reeve, London. [October]