Columbella albomaculata: Shell elongately fusiform, rather solid, whitish, tinged with violet; lower portion of the whorls faintly reticulated with chestnut, with broad brown flames, thickly spotted with white below the sutures ; whorls eight, flattened, basal whorl spirally ridged anteriorly; aperture rather narrow, two-fifths the entire length of the shell ; columella arcuated, callous, transversely finely ridged in front; outer lip sinuated posteriorly, edge thin, thickened exteriorly, and dentated within. Length 5,5 lines, breadth 2 lines. Australia. New Queensland. Under stones at low water, Port Jackson.

Shell moderately broad (for the genus), whorls slightly rounded, spire straight sided, aperture 40% of shell length. Protoconch of 2-2¼ smooth whorls. Spiral sculpture restricted to cords on base; axial sculpture absent. Outer lip sinuous in profile, with shallow sinus; lip much thickened externally; thickened internally, with 6-8 denticles decreasing in size from the second uppermost. Columella callus sharp-edged in mature shells; axial ridge along edge bearing about 5 small denticles. Siphonal canal very short. Colour fairly constant, apart from occasional white shells; on the body whorl, 1-3 rows of large white spots below the suture; below these, axial tan flames on upper half of whorl, sometimes coalescing to form a spiral band; below these, smaller white spots in quincunx on remainder of whorl. Interior white. Periostracum smooth.
Size: Up to 12 mm in length, adults usually 9-10 mm.

This species has a fairly constant colour pattern, although the depth of colour varies from pale to dark brown. M. semiconvexa sometimes has a similar colour pattern, but is larger and broader. M. lincolnensis is similar in size, but is more slender with flat whorls, a different colour pattern and brown in the aperture. M. leucostoma is similar in size and shape and can only be distinguished by colour pattern.

Endemic to Australia; Alexandra Head, Queensland, southwards to Waratah Bay, Wilsons Promontory, Victoria. Also Bass Strait islands, but not Tasmania. One record from Yeppoon, Queensland, needs confirmation.
Habitat: Intertidal on rocky shores, on algae and under stones. Very common.