Holotype: Shell large for the genus; surface chalky white, colorless except for a narrow, faint brown line well below the periphery on the final whorl; aperture about 1/3 the length of the shell; subsutural area markedly concave, outline strongly tabulate. Protoconch missing, postnuclear whorls 11. Axial ribs 7 on early whorls, increasing to 12 on penultimate whorl, obsolete on the shoulder, extending to the suture below on the early whorls, nodulous at the shoulder on the final whorl, but weak across the body whorl and obsolete upon the pillar; back of last whorl with an elongate rib subtending the sinus and a more massive rib 1/5 turn back; spiral sculpture faint on early whorls, consisting on the final whorl of numerous, unevenly spaced threads, more pronounced upon the pillar. Sinus deep, U-shaped, strongly outward projecting, bordered on the inside by curved parietal callus; lip edge thin, stromboid notch weak; anterior canal scarcely defined, deeply notched; inner lip slightly raised above the pillar. Height, 37.9, diameter, 14.1 mm.

Largest of the Drillias, characterized by the chalky surface and paucity of spiral sculpture. Drillia roseola (Hertlein 8c Strong, 1955) has similar proportions but is rose colored with a smooth surface and has fewer axial ribs.

Pacific Central America. Type Locality: Sonora, Mexico, in the vicinity of Kino and Agiabampo Bays, 10-35 fathoms.