List of sources:
Kilburn, R. & Rippey, E. Sea shells of southern Africa (p. 18). Johannesburg: Macmillan, 1982.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1868-1980.
Pappe, L. Synopsis of the edible fishes of the Cape of Good Hope, 2nd ed. Cape Town: Brittain, 1866.
Royal Society of London. Catalogue of scientific papers, 1800-1900. London: Royal Society, 1867-1925.
Standard encyclopaedia of southern Africa (Vol. 4, p. 545). Cape Town: Nasou, 1970-1976.
Wikipedia, the Free Encyclopedia. https://en.wikipedia.org as on 11 November
2008.