Shell small, somewhat elongated, with a distinct spire, white, and shining, whorls three, spire bluntly rounded, and bending slightly towards the right. Aperture moderately open, widening a little towards the squared front; outer lip thickened, but with a sharp edge. Columella slightly excavate, bearing four prominent, strongly ascending plications, which reach more than half way up the aperture. Length 4., breadth 2.5 mill.
Locality: Tvpe from 40 fathoms, 3 miles east of Schouten Island, with a number of others. It is with some hesitation that I have described this shell, which has a considerable resemblance to several others. From M. pygmaea, Sowb., it differs in being narrower, with the plications reaching much higher on the pillar; than M. translucida, Sowb., it has a shorter spire, with a different apertural front, and is much smaller. It may possibly be a small form of M. olivella, Reeve, but there are considerable differences.
The great height reached by the plaits on the columella, the slightly nodding appearance of the spire, its small size and constant form, may distinguish it.

A number of specimens, from 5 to 25 fathoms, Twofold Bay, were sorted from the Roy Bell Collection, and agree very well with May's schoutanica. This is a new record for New South Wales. The specimen figured is 7-5 mm. in length. This species is like inconspicua, but is larger, broader, and has a slightly different contour. It is ivory coloured and highly polished, with a tendency to develop faint plications on the shoulder.