Traits name details
original description
Sowerby, J. (1818-1822). <i>The Mineral Conchology of Great Britain; or Coloured Figures and Descriptions of Those Remains of Testaceous Animals or Shells, which have been Preserved at Various Times and Depths in the Earth. </i>Vol. III. Privately published, London. pp. 1–40, pls. 204–221 (1818); pp. 41–98, pls. 222–253** (1819); pp. 99–126, pls. 254–271 (1820); pp. 127–186, pls. 272–306 (1821); pp. 187–194 (1822)., available online at https://www.biodiversitylibrary.org/page/51561256 page(s): 131,- pl. 274 figs 4-7 [details]
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