A very large, heay shell with a low spire and inflated body whorl, angled at the shoulder. Each whorl has three varices, between which there may be one or two, knobbly vertical ribs. Both varices and siphonal canal have short, frilled spines. Fine spiral ridges cover all whorls. The outer lip has a sawtooth edge and, toward its lower end, a prominent tooth. The columella is smooth. White, with brown ridges and blotches; columella pink.