Narrow, thick, imperforate; longitudinally sculptured with thick, low ribs, angled at the upper third, and obsolete at the rather deep suture, crossed by spiral threads; protoconch, fairly blunt, of two smooth whorls; adult whorls nine, flat¬tened ; basal keel indistinct; aperture oval, not separate from the body-whorl, a thick varix forming the outer lip; a further thick varix is situated in the middle back of the penultimate whorl. Holotype, height 13 mm. diameter 4 mm., Gulf St. Vincent, S. Aust., 22 fathoms (D. 13301). Allied to Scala apostolorum Iredale, but is larger, and also differs in that the basal rib is obsolete; the general appearance too is different.
The present species was formerly classed in error as Scala crassilabrum Sowerby, from the Philippines and Central America.