Nucleus small, of a single whorl or slightly more, dark chestnut-brown in color, smooth and slightly tilted, followed by four and a half subsequent whorls, with the inception of which the sculpture changes abruptly; the first has two, the second three, the third four spiral threads between the periphery and the subsequent suture; the two original threads stronger than the others, but all becoming relatively feebler, and on the last whorl obsolete; the posterior slope of the whorls is smooth except for lines of growth; on the last whorl there are very obscure indications of obsolete spiral sculpture; the whorls have, in the type specimen, about five obscure nodes at the shoulder, reminiscent of the varices of the other species of the genus; whorls increasing in size rapidly, the shoulder slope flattish, situated at the posterior third on the last whorl, the suture, distinct but not appressed; aperture ovate, the body with a light glaze, the outer lip thickened, sharp-edged, tinged with orange color; the type has eight small denticles within on the callus; canal short, open, slightly recurved; general tint of the type specimen dark, livid, olive color; operculum murieoid.
Height of shell 21.5, of last whorl 18.0, of aperture excluding the canal 10.0; max. diameter of the shell 11.0, of the aperture 6.2 mm.
The animal, like that of the other species, is purpuriferous. It presents a strong contrast to the other species of the genus in its general smoothness and absence of conspicuous sculpture and the bright color of the lip.