Shell of moderate size, narrowly spindle-shaped, widest near the mid'point; spire high, acute, turreted, much produced, angulate at the shoulder; whorls 8,5 to 9,5 ; early postlarval whorls with 4 strong spiral cords amongst which the second quickly becomes first dominant, then peripheral and strongly angulate, continuing on the bodywhorl as the heavy shoulderkeel, below which are about 10 wellspaced cords, besides 3 or 4 less sharply defined threads on the siphonal fasciole; intervals between the cords rather shallowly concave, traversed on the early post-nuclear whorls by numerous fairly strong but readily corroded axial threads, which on the more mature whorls become reduced to a mere irregular striation, a fine spiral striation also evident here in most specimens. Aperture narrowly lanceolate, a little over half as long as the shell; outer lip thin and sharp in adolescent shells, a little thicker at maturity, crenulated by the spiral cords; columella nearly straight, with 3 very oblique plaits, the lowermost often very weak. Base narrowing straightly to the widely open canal. Periostracum thin, persistent, quite uniformly fawn' colored, the spiral cords sometimes darker. Alt. of holotype 32.1, max. diam. 8.2, alt. aperture 16.6, max. diam. aperture 3.7 mm. Type-Locality: 30-50 fms., off Cabo Haro, Sonora; J. X Schowalter et al., 31 Dec. 1959.