Nassarius (Niotha) jactabundus (Melvill, 1906) (Plate 15, figs.9,10) 1906. Nassa (Alectryon) jactabunda Melvill, Proc. Zool. Soc. Lond. 7:76, pl. 7, fig. 17. Shell up to 20.0 mm in length, elongate-ovate, body whorl occasionally broad, spire acuminate, teleoconch of 5-6 convex whorls, protoconch of 3-3% glassy, prominently carinate embryonic whorls, upper spire whorls angulate at sutures; sculptured with slender axial ribs which are bisected by numerous spiral cords which render ribs nodulose; sutural nodules slightly more prominent and frequently with 2 stronger spiral cords anterior to sutures giving the impression of paired sutural nodules. Aperture narrow, outer lip thickened and denticulate within, columellar callus expanding on to body whorl, either well-bordered or spreading and slightly thinning above parietal wall, lower half of columella denticulate, siphonal and anal canals distinct. White to pale straw-yellow in colour, sometimes or- namented with 2 moderately broad brown bands on body whorl, columellar callus and aperture white. TYPE LOCALITY. Persian Gulf. DISTRIBUTION. From the Red Sea to the Persian Gulf and Pakistan. In sand, usually subtidal to a depth of 13 m. Type specimens. The holotype of N.jactabundus (Melvill), is in the British Museum (N.H.), London, No.1906.6.13.17., length 19.3 mm, width 11.1 mm. Material examined. RED SEA: Eilat, Gulf of Aqaba (TAU); PERSIAN GULF: Reden near Bushire, 3-5 m; St.18, S. of Boridini, 13 m; Bushire, 6 m (all ZMC); GULF OF OMAN: Jask (coll. Redfield); PAKISTAN: Karachi (coll.Melvill). The species is very similar to N.obesus (G. & H.Nevill), but differs by its coarser appearance, angulate spire whorls, numerous overriding spiral threads and colouring.