Baryspira tirangiensis (Marwick, 1926)

"Shell large, heavy, subcylindrical. Spire up to one-third height of aperture, low-conical to dome shaped. Spire whorls covered with heavy callus which descends over angle of shoulder of body-whorl. Smooth band relatively narrow, bounded below by wide depressed band, the raised ridge between this and fasciole of anterior notch is also wide, and is bounded below by well-marked broad shallow sulcus. Aperture inclined, hastate, deeply and broadly notched below, channelled above, channel extending a considerable distance across spire-callus. Outer lip retreating above, with short spike at bottom of smooth area. Columella short, concave, twisted strongly forward below and expanding into broad beak which has single broad longitudinal sulcus bounded on outside by narrow ridge, this in turn is separated from basel limb by broad rather deep groove. Inner lip spreading as thick callus-pad on parietal wall, and extending across smooth area reaches back of shell and almost up to spire, its outline circular. Height, 59 mm.; diameter, 35 mm.".