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W.  Kobelt, Land - und Süsswasserkonchylien, vol. 24. 1898.

F.  Wiegmann, ?Landmollusken (Stylommatophoren). Zootomischer Teil?, Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, vol. 24, pp. 289-557, 1898.

E. A.  Smith, ?A lsit of the land-shells of the island of Lombock, with descriptions of new species?, Proceedings of the Malacological Society of London, vol. 3, pp. 26-31, 1898.