Cancellaria granosa: Protoconch: 1,5 smooth, shining whorls, first half-whorl deviated, merging gradually into main whorls, nucleus submerged. Teleoconch 4 whorls, flatly convex, strongly shouldered. Sutures strongly impressed. Sculpture of strong rounded oblique axial ribs, 18-20 on body-whorl, 14 on penultimate, and strong spiral cords, 15 on body-whorl, 4 on penultimate; double cord at angle of shoulders, whole sculpture over-ridden by microscopic growth lines; sculpture presents a grained or decussated appearance. Umbilicus a fine fissure behind inner-lip callus. Aperture ovate, tapering to short, broad open siphonal canal; columella straight, 3 weak oblique plaits, centrally situated; inner-lip recurved as strong callus over umbilical fissure; outer-lip regularly curved, thin, 10-12 lirations commencing on or a little below outer-lip and extending well into aperture. Colour pinkish-fawn with red-brown or grey-brown interstices between transverse cords, red-brown spots on shoulders; interior, including inner-lip, blotched with brown. Dimensions. Holotype, length 43 mm, breadth 25-3 mm. Average size approx. 33 mm x 20 mm.

Cancellaria granosa: In his original description Sowerby referred to two figures, Nos 16 and 17, however Strong (1954: 17) showed the drawings to be those of two distinct species, and named the species based on fig. 16 as Cancellaria peruviana, giving the type locality as Peru. C. (Sydaphera) granosa is a lot less common than C. (S.) undulata and confined to a decidedly smaller area; main recognition point is the strong transverse cords crossing the axial ribbing in early whorls, compared with the finely incised lines crossing the ribs in C. (S.) undulata.

Cancellaria granosa: Type locality. Tasmania (Sowerby, 1849). South Australia (Brazier, 1884: 226). Distribution. From Twofold Bay, N.S.W. (35° 06' S., 149° 45' E.), throughout Victoria, Tasmania (north and east coasts), King Island, and South Australia. Intertidal to 15-27 metres off Gabo Island, Victoria. Recorded as being taken alive on sand banks in Victoria, Macpherson and Gabriel (1962: 225).