Elongate-ovate; sculptured with many fine and finely granulose radial cords. Exterior brown; interior brown, dark brown within the spatula.
2 cm long. South West Pacific; north Qld to Sydney, NSW. According to Hedley (1916) this animal was found in Sydney Harbour "under large stones in the mud-zone in communities of a dozen or so under the same rock". He described the animal as uniformly crimson. Synonyms: ferruginea H & A Adams, 1854; vagans Iredale, 1929; escensa Iredale, 1929.