Protoconch 2 convex translucent whorls, obliquely closely axially ribbed, 15 to whorl, commencing at nucleus, which is submerged, 8 fine transverse striae between ribs, sculpture merging gradually into that of main whorls. Teleoconch 4 whorls, convex, periphery above centre, slightly quadrate in form. Sutures strongly impressed. Sculpture: whorls moderately to strongly axially ribbed, 14 on penultimate and body-whorl, crossed by strong transverse flat-topped striae, 6-7 on penultimate, 13 on body-whorl, slightly nodular in places at intersections with ribs, interstices a little broader than striae; microscopic growth lines cross both transverse striations and interstices. Umbilicus a very fine fissure behind inner-lip callus. Aperture broadly and roundly lunate; inner-lip reflected anteriorly on to body-whorl, a light glaze posteriorly; columella slightly arcuate, devoid of folds; outer-lip thin, regularly curved, crenulated exteriorly by striae; siphonal canal short, broad and open. Colour off-white, opaque. Dimensions. Holotype, length 4,5 mm, breadth 1,76 mm. Fully grown.

Shell minute, thin, ovately fusiform, deeply constricted at the sutures. Whorls five, rather tumid medially, flattened above contracted at the base; first whorl dome shaped. Sculpture : above radials predominate, below spirals prevail. The radials are prominent undulating ribs, numbering nine on the antepenultimate whorl; they gradually diminish in size as growth proceeds, and vanish on the base. The spirals amount to thirteen on the last whorl, and seven on the penultimate ; they consist of sharp elevated cords, overriding the radial ribs and parted by flat interstices of twice their width; the interstices are finely, transversely grooved. Aperture narrowly reniform, rounded above' and below outer lip sharp, columella ending in a single broad fold, whence a callus layer proceeds which overlies a narrow shallow, umbilical groove. Length, 4,5 ; breadth, 1,76 mm.
A single specimen (the type) from the present station, another imperfect example from 100 fathoms, sixteen miles east of Wollongong.

The above specimen from off Wilson's Bluff, W.A., has 5 transverse striae in lieu of 7 on penultimate whorl, axial ribs are less pronounced than in holotype, and incremental growth lines are very clear and prominent in interstices between transverse striations.

From 3 km N.E. of W. side of Gillett Cay, Swain Reefs, Queensland, (21° 43' S., 152° 25' E.), southwards along Queensland coast and New South Wales, thence westwards to Wilson's Bluff, Western Australia, (33° 05' S., 128° 40' E.) in depths from 63 to 183 metres. Type locality. 35 km E. of Narrabeen, New South Wales (33° 45' S., 151° 33' E.), 146 metres.