Nassarius (Zeuxis) haldemanni (Dunker, 1847) Shell up to 18.0 mm in length, elongate-ovate and somewhat biconical, teleoconch of 5½-6 con- vex whorls, protoconch of 3-34 glassy-brown embryonic whorls, sutures tight, finely incised and almost impressed; post-embryonic whorls sculptured with numerous, slender axial riblets, riblets becoming absent on last 2-3 whorls except for 2-3 crowded axial ribs behind outer lip varix; axial riblets on spire whorls crossed by 5-6 fine spiral striae, striae reduced to 1-2 slender sutural cords on last 2 whorls and additional 9-10 cords at base, 8-9 oblique cords on siphonal fasciole and from 22-28 short spiral threads on the back of the outer lip crossing varix. Aperture narrow, outer lip thick and broadly variced, interior with 8-9 strong denticles, columellar callus narrow and well-bordered, columella with 7-11 small denticles along its entire length, siphonal notch and anal canal distin. First 2-3 post-embryonic whorls white, later whorls with 1-2 interrupted orange-brown spiral bands on spire whorls and usually 3 such bands on body whorl, some individuals with additional nebulous orange-brown streaks, columella and aperture white. TYPE LOCALITY. East Indies (haldemanni); Masbate, Philippines (sertula); Massawa, Red Sea (isseli). DISTRIBUTION. From the Red Sea to the Philippines and the Fiji Is. Subtidal, to a depth of 40 m. Type specimens. The holotype of N.haldemanni (Dunker) is in the Zoological Museum, Humboldt University, Berlin, length 13.6 mm, width 7.5 mm. Two syntypes of Nassa sertula A.Adams, are in the British Museum (N.H.), No.1973146, and the adult syntype measuring length 16.0 mm, width 8.0 mm, is here designated as the lectotype (pl.28, fig. 11). The holotype of Nassarius isseli Bisacchi, is in the Museo Civico di Storia naturale, Genova, length 6.5 mm, width 3.5 mm. Material examined. THAILAND: west coast, 8°45′24″N & 98°07'48"E, 29-31 m (ZMC); INDONESIA: Kei-Oerne, Kai Is, Moluccas (ZMC); PHILIPPINES: Masbate (BMNH); FIJI IS: Moce I, Lau group (AIM). This appears to be a rare species which has been confused with N.comptus (A.Adams). For further discussion refer to the latter species. 1826).