Perrinia

Herbert, D. G., 2012, A revision of the Chilodontidae (Gastropoda: Vetigastropoda: Seguenzioidea) of southern Africa and the south-western Indian Ocean, African Invertebrates 53 (2), pp. 381-381 : 465

Key to species of Perrinia in the south-western Indian Ocean

1 Shell with broad, low, opisthocline axial ribs ........................................ angulifera

– Shell lacking such ribs, axial sculpture restricted to relatively narrow, prosocline pliculae...................................................................................................................2

2 Shell small (length up to 6.0 mm); peripheral spiral cord at most weakly stellate ........................................................................................................................ konos

– Shell larger (length up to 11.0 mm); peripheral spiral cord strongly stellate........... ..................................................................................................................... stellata