Benson, W. H., 1860, Notes on Plectopylis, a group a Helicidae distinguished by several internal plicate ephiphragms; with the characters of a new species.

Benson, W. H., 1860, Notes on Plectopylis, a group a Helicidae distinguished by several internal plicate ephiphragms; with the characters of a new species., Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the ' Magazine of Botany and Zoology', and of Louden and Charlesworth's ' Magazine of Natural History', Series 3 5, pp. 243-247