Elongated cylindrical, inflated, umbones near (but not at) anterior end, thin-walled, cream-white with yellow-brown periostracum, with numerous irregular riblets; interior iridescent cream with purplish tint, margin smooth; living bored into soft rock or dead coral. North Carolina to Florida, Bermuda, Bahamas, West Indies, Gulf of Mexico, Caribbean Central America, South America ((Colombia, Brazil), also New Caledonia, Gulf of Siam, India. Length 105 mm (to 110 mm). Compare other Lithophaga species (L. nigra is black-brown, whereas L. aristata and L. bisulcata have calcareous posterior extensions) and Coralliophaga coralliophaga, which is whiter and thicker shelled with heterodont hinge teeth.