Sheppard, R. 1825. Descriptions of seven new British land and fresh-water shells, with observations upon many other species, including a list of such as have been found in the county of Suffolk. Transactions of the Linnean Society of London 14: 148-170. Available electronically.
‘Leach MS’ Sheppard, 1825. Trans. Linn. Soc. London 14: 149.
‘Leach’ Sheppard, 1825. Trans. Linn. Soc. London 14: 150.