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Cancellaria granosa Sowerby, 1832 Description: Shell solid, heavy, whorls strongly shouldered, sculptured with strong, oblique, evenly spaced axial ribs, 18-20 on body whorl of mature shells. Axial ribs crossed by spiral ridges, about 15 on body whorl and 4 on penultimate whorl, usually forming nodules at the intersections. Columella with three plaits, the lowest edging the anterior canal. Inner lip calloused, expanded on mature shells, leaving umbilical opening as a fine slit. Outer lip with 10-12 lirae reaching deep into the aperture. Colour pinkish fawn, with red-brown patches on shoulders. Size: Up to 35 mm in length, typically about 28 mm. Distribution: Endemic to Australia: Twofold Bay, NSW, to SA, including Tasmania. Habitat: Intertidal to about 20 metres. Common. Comparison: The spiral sculpture of this species consists of about 15 strong ribs. In C. undulata it is much weaker, and present as more numerous grooves or ribs, although at the extremes of variation the species can be quite similar. C. granosa has a more sharply angled shoulder than C. undulata, and the lirae in the aperture are less numerous. Remarks: This is a common shell in southern Australia, but in NSW it is known only from Twofold Bay, where it is trawled infrequently. Figs. 1,2 Wilsons Promontory, Victoria (C.070122)
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