The identity of the European greenhouse Gulella (Pulmonata: Streptaxidae)

The recent collection of a living specimen of Gulella in Cambridge Botanic Garden led to a further search of literature and the fact that Gulella io Verdcourt is the same as a species described by Degner from Liberia. Details of the radula and part of the genital anatomy of the Cambridge specimen are described; these agree remarkably well with those given by Degner. A name he proposed is, however, not available for use and G. io remains the correct name.