Sowerby, J. 1817. 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 2: 117-194, pls. 151-186. Available electronically.
Sowerby, 1817. Mineral Conchology 2: 140, pl. 162, figs. 2-3.