Described as Teramachia chaunax:
The shell is elongate fusiform, rather strong, smooth, white suffused with pale brown under a thin, olivaceous periostracum. Length of shell 28 mm, width 8.4 mm. Apex lost, eight postnuclear whorls remaining. Strong axial ribs on the spire, persisting on the body whorl but somewhat weaker there. Twelve axials on the first postnuclear whorl, increasing to 16 on the body whorl. Distinct axial growth lines are present in addition to the axial ribs. A single spiral cord below the suture, most distinct on the early whorls, producing a low nodule where it crosses each axial, thus giving the whorls a faintly shouldered aspect, growing indistinct on the body whorl. Outer lip simple, sharp; parietal wall smooth, not callused. Columella nearly straight, with three strong oblique plaits, the uppermost one strongest, forming deep within the aperture and scarcely visible from without. Anterior canal slightly produced, with about a dozen weak spiral threads. The operculum is elongate, rather strongly curved, with terminal nucleus; the muscle scar is ovate and rather large. The radula is triserial, as in T. meekiana, but the rachidian has a large, erect cusp with usually three denticles on each side. The laterals have a flattened, clawlike cusp at the end of an elongated base, as in L. meekiana.

This shell is very much like Dalls L. meekiana as originally described and figured, but differs in the persistence of the axial ribs on all whorls, the reduction of the subsutural spirals to a single cord at the shoulder, and the origin of the columellar plaits very deep in the aperture. The size of the aperture relative to the height is more like that of the original material of L. meekiana, which apparently was not adult, than that of the larger specimen from Sta. P-1225.