Sowerby, J. 1816. 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: 29-116, pls. 115-150. Available electronically.
Sowerby, 1816. Mineral Conchology 2: 85, pl. 137.