Nassarius (Zeuxis) algidus (Reeve, 1853) (Plate 26, figs.12,13) 1853. Nassa algida Reeve, Conch. Icon. 8:pl.22, figs. 145a,b. 1886. Nassa (Zeuxis) algida Reeve, Watson, Rept.Sci. Res. Voy.H.M.S. "Challenger", 15:180. 1886. Nassa (Zeuxis) algida var. chlora Watson ibid., 15:181. Shell up to 25.0 mm in length, elongate-ovate, light in weight, teleoconch of 6½-74 convex whorls, protoconch of 1½-2 glassy, non-carinate embryonic whorls, sutures narrowly ledged; post-embryonic whorls sculptured with moderately thick, angulate and slightly slanting axial ribs, a subsutural groove which separates sutural nodules and a few weak spiral striae in the interspaces; axial ribs become obsolete towards the anterior suture on later whorls and on the last two whorls only remnants of axial ribs remain in the form of irregular, axially oriented sutural nodes, and occasionally an additional subsutural groove; base of body whorl with 3-6 cords, siphonal fasciole with 5-7 cords, 2-3 axial ribs are crowded on the back of the outer lip. Aperture narrow, outer lip thickened and moderately variced, interior with 7-12 lirate denticles, anterior edge of outer lip occasionally with small spinose denticles, lower half of columella calloused and laminate, parietal wall only glazed, columella with 7-9 denticles, siphonal notch and anal canal distinct. White in colour, ornamented with reddish-brown axial streaks which are interrupted by a single white band on spire whorls and 2 such bands on the body whorl, forming 3 rows of quadrate spots, varix and columellar callus white, interior of aperture banded with orange-brown. Operculum yellowish-brown and simple at margins. TYPE LOCALITY. Moreton Bay, Queensland, Australia (algidus); off Albany I, Cape York, Torres Strait, Australia, 5-22 m (chlora). DISTRIBUTION. From Western Australia to North Australia and sc✓ Shern Queensland, Australia. On sand-bars, from the intertidal zone to a depth of 22 m. Type specimens. Three syntypes of N.algidus (Reeve) are in the British Museum (N.H.), London, No. 197314, and the specimen measuring length 23.2 mm, width 12.5 mm, which is holed on the ventral side of the body whorl, is here selected as the lectotype (pl.26, fig.12). The type of Nassa chlora Watson, has not been located at the British Museum (N.H.).