Annals of the South African Museum, Volume 47, Issues 1-2

3rd whorl 4th whorl Adams animal aperture apex apical appears axial Bartsch basal base become brown Cape central plate closed collected columella cusp dead Delagoa Bay diam DIEGO distinct Distribution Durban early East London examples False Bay fathoms figure granules grooves growth-lines intermediaries keel Krauss larger last whorl lateral plate less lines Linn living locality lower marginal marginal plates Martens material metres middle Muir narrow Natal nodules nucleus obtained operculum outer lip P.F. coll pale peripheral Pieter Faure Pleistocene pliculae Point Port Elizabeth Postnatal whorls present Protoconch Radula recorded Remarks ribs River Natal rows Schilder sculpture seems seen shell shoulder shows side slightly Smith smooth sometimes South African Museum Sowerby species specimens spiral lirae striae strong suture Table Bay Thiele Tomlin Trifora Turton Type umbilicus upper usually valve