Shell of moderate size, thin and light in construction, with a narrow, elevated spire, moderately produced siphonal canal, and strongly carinate, shouldered whorls. Columella straight, narrowly perforate, umbilicus bounded by a narrow siphonal fasciole marked by imbricated sculpture. Aperture triangular, outer lip without interior lirations. Nuclear whorls missing and early postnuclear whorls eroded; almost 7 whorls remaining. Carina broad, thin, widely upturned, broadly serrated marginally; the marginal serrations, which are not filled with shelly material, are mostly broken in this specimen, and probably would be more or less so, even in living specimens. The sculpture of the early whorls consists of flattened, probably upturned, spines where low axial ribs cross the shoulder. The third and fourth preserved postnuclear whorls show a distinct raised spiral ridge just above the suture, but this becomes less prominent on the later whorls and is evident on the body whorl only as a slightly more prominent, low spiral cord. Axial growth lines rather irregular but distinct. Spiral sculpture of low, broad threads without prominent imbrication. Shell dead, discolored a uniform dull grey. Measurements.—Length 24.4 mm, width including carina (edge imperfect) 22.7 mm (holotype).

The broad, marginally serrated carina of this species superficially resembles that of the Japanese Latiaxis mawae (Griffith & Pidgeon), but in that species the spire is depressed, the parietal lip is free of the preceding whorl in mature shells, and the umbilicus is widely open. From Coralliophila dalli, this species differs in the form of the carina, the nearly smooth surface, and the narrow umbilical opening.

Straits of Florida, off Settlement Point, Grand Bahama.