As Trochus subangulus:
Shell conic-pyramidal, axis imperforate hut appearing subumbilicate, solid, thick, white, longitudinally flammulate with bright red ; spire conic, apex acute, whorls 10, spirally encircled by numerous (about 10 on upper surface) beaded lira, which are separated by superficial interstices; above the sutures there is a series of short folds or knobs which usually become obsolescent upon the periphery of last whorl; body-whorl obtuse at the periphery, nearly flat below, indented around the false umbilicus, obsoletely concentrically lirate, the line about 9 in number, red and white articulated, interstices white; aperture 'transversely rhomboidal, somewhat rounded; columella nearly vertically descending, sub dentate at base, above with a profoundly entering spiral fold; parietal wall bearing a heavy transparent callus, which is excavated around the axis. Alt. 55-70, diam. 45-60 mill.
East Indies; Philippines/N. Australia.