Shell small, solid, ovate-lanceolate, turreted, the prominence of the varix inclining the shell to a hatchet form. Colour buff, apex pale orange ; darker orange on the base and aperture. Whorls seven, including the protoconch of three whorls. Sculpture: Above the sharp shoulder angle run two or three small spiral threads; below it on the last whorl are eleven spiral cords, at first prominent and spaced, but gradually becoming smaller and more crowded on the base and snout; on the last whorl are nine radials descending from the shoulder to the base as prominent perpendicular riblets. Aperture: The varix is very prominent, folding a free limb towards the aperture, externally it is traversed by six spiral threads, internally there are three tubercles ; the sinus is excavated at an oblique angle to the aperture, and is broad and effuse; canal short and open ; columella with two longer and one short plait, the latter lowest. Length 3.5 mm., breadth 1 mm.
DESCRIBED BY HEDLEY as Etrema acricula.

As Etrema acricula:

A single specimen 3 mm high, featured by 1) fusiform, somewhat turreted shell, 2) protoconch broadly conical, of 3 whorls, the first 2 convex and with tilted tip, the last with a submedian angulation gradually changing into a sharp mid-abapical keel, transition to teleoconch abrupt, marked by a sinusigera lip, 3) spire whorls (about 3) angular in the middle, sutures shallowly impressed, slightly undulating, 4) body whorl slightly more than 50% of total height, moderately constricted at the base toward a short neck, 5) aperture narrowly oval, abapical canal wide and rather deep, outer lip thin edged, apparently bent inward, backed by a varix and with 3 mid-ad apical inner tubercles, the adapical one stronger, somewhat constricting the entrance of the anal sinus, inner lip thinly callused, with blunt parietal tubercle and 2 nearly horizontal columellar plaits, anal sinus deep, U-shaped,with thick, somewhat everted rim, occupying the shoul¬der slope but not in touch with the suture, 6) sculpture of collabral ribs overridden by spiral cords and threads forming small nodes on crossing the ribs; the ribs, 9 throughout, are low, round-topped, slightly wider than interspaces, and vanish at the adapical end of the neck; the spirals consist of 2 threads on the shoulder slope, 1 cord over the peripheral angulations, 1 emerging from the abapical suture and becoming manifest on the body whorl; 9 cords occur over the base; the whole teleoconch surface bears microscopic granules.

This species has somewhat the appearance of a minature and telescoped Pseudoraphitoma ditylota.

Australia. Queensland.

Nannodiella acricula was so far known to range from the Red Sea to Australia. It seems to be an infralittoral element. Records from Hawaiian Islands are doubtful, since those shells are reported to have 4.5 to 5.5-whorled greater protoconch