Calliostoma comptum (Adams, 1854)
Description: Whorls straight sided, sutures indistinct; sculptured with spiral rows of beads, 4-6 on penultimate whorl and 4-9 on body whorl above the basal margin. Basal margin roundly angled. Base rounded, with 7-10 spiral ribs, usually smooth, occasionally beaded. Interior of outer lip thickened; in mature shells two strong elongate nodules at bottom of aperture and two lirae above, extending into aperture. Columella smooth with weak tooth centrally; umbilicus closed. Colour fawn, often with lower row of beads on each whorl white; columella white. Interior nacreous.
Size: Up to 13 mm high, usually less than 8 mm.
Distribution: Endemic to Australia; Brunswick Heads, NSW, to Western Port, Vic.
Habitat: Subtidal, down to 137 m. Mainly known from beach shells. Uncommon.
Comparison: See C. legrandi.
Synonym: Calliostoma purpureocinctum Hedley, 1894
Figs. 1,2: Off Eden, NSW (C.351561)
Copyright Des Beechey 2000