H.  Adam, ?Description of a new Genus of Land-Shells from the Island of Labuan, Borneo?, The annals and magazine of natural history, including zoology, botany and geology, vol. 3, p. 177, 1865.

H.  Adam, ?Descriptions of a new genus and some New species of mollusks?, Proceedings of the Zoological Society of London., vol. 1865, pp. 753-755, 1865.

H.  Adam, ?Descriptions of six new species of shells, and Notes on Opisthostoma decrespignii?, Proceedings of the Zoological Society of London, vol. 1866, pp. 445-447, 1866.