Voluta mitra-abbatis. Chemnitz, &c.
Obs. Testa plerumque spirâ elongatâ, aperturâ ad basin angustatâ, siphone superiore parvo aut nullo.
III. Apertura suprà acuminata, extrinsecus recta, infrà rotundata, dilatata, vel effusa.
Mitræ papalis, episcopalis, &c.
Obs. Testâ plerumque lævi ad basin obtusâ, truncatâ, labio exteriore margine crenato, gulâ lævi.
Generic Character.
Shell unequally fusiform; spire lengthened, attenuated; outer lip simple not toothed within. Columella plaited.
Divisions.
III. Aperture narrow, linear, above angulated, below a little contracted.