original descriptionForbes, E.; Hanley, S. C. T. (1848-1853). <i>A history of British Mollusca and their shells</i>. London, van Voorst. 4 vols., 2064 pp., 203 pls. , available online athttp://www.biodiversitylibrary.org/bibliography/16341 page(s): 386 [details]