Sowerby, G. B. I. (1822). Remarks on the Genera Orbicula and Crania of Lamarck, with descriptions of two species of each genus; and some observations proving Patella distorta of Montagu to be a species of Crania. Transactions of the Linnean Society of London. 13 (2): 465-473, pl. 26.
Remarks on the Genera <i>Orbicula</i> and <i>Crania</i> of Lamarck, with descriptions of two species of each genus; and some observations proving <i>Patella distorta</i> of Montagu to be a species of <i>Crania</i>