Two shells from the stations 16 and 20 (Shark Bay), which are light brown of colour, pointed, slender, with about 15 slowly and steadily increasing whorls, of which the 5 embryonic whorls have 2 spiral keels and axial riblets; the following whorls are sculptured with 3 tubercled cords; the last whorl has 3 smooth cords on the base; the siphonal canal is short, the aperture has an acute angle in the upper part. Height 5 mm, diameter 1.3 mm, other shells are only 3.25 mm high.

Diagnosis
Lectotype height 5.1 mm. Shell conical, with flat whorls. Teleoconch of 11 whorls. Paralectotype is 3.3 mm high and has eight whorls. Teleoconch whorls have three tubercled spiral cords, well visible since the first whorl. A fine suprasutural smooth cord is also present. The last whorl has a fourth tubercled spiral cord, and the base further two, but smooth. The peristome has a posterior sinus. The protoconch is broken and lacks the very first whorls, but it is clearly multispiral: three whorls are clearly visible and are ornamented by two spiral keels and axial riblets. Protoconch light brown. The teleoconch has the first whorl white, then it is brown until the sixth row; the lower whorls have the first row of tubercles light brown, while the other two are white. Base light brown.

Remarks
The lectotype and paralectotype are both fully mature, but show significantly different sizes, 5.1 and 3.3 mm respectively, as observed in several other species (Marshall 1983).

Western Australia