Shell irregularly conical, thin or subsolid, pure dead white without and shining white within, sculptured with fine radiating threads and strong, very irregular, oblique corrugations or wrinkles, which sometimes break up into frills near the base; apex spiral, with one to one and a half whorls, posterior; interior process attached along the posterior part of the shell, elongated, so that the points may reach below the base of the shell, obliquely truncated.
Diameter, 40; height, 23 mm.
Aguadilla; San Juan, Porto Rico; St. Thomas.

Cheilea equestris (Linnaeus, 1758). Diameter, 25 mm; height, 10 mm. Shell: limpetlike, circular and conical but with a wide range of shape because of the sessile habit; apex nearly central; margins crenulate and undulate; interior with a spiral diaphragm thickened basally and attached at the apex. Protoconch: neritoid, light brown, smooth or obliquely cancellate. Sculpture: exterior with fine radiating ribs crossed by spiral threads, the junctions sharply nodular; interior polished.
This calyptraeid is rarely found in shallow water but is common at depths of from 50 to 400 meters.
C. equestris is generally considered to be circumtropical in distribution, occurring on both sides of the Americas and through the Indo-West Pacific. The shells are variable in texture, shape, and sculpture, and many names have been used, some forms of which may represent good species.