104.5 mm, no data (WLC, ex Bennett collection, 2002). Type locality. Monte Bello Islands off northern coast of Western Australia, Indian Ocean, selected herein. Other material examined. Australia: 1, 53.4 mm, poor specimen with apex missing, northeast of Monte Bello Islands between 20° 07 S, 116° 12' E and 20° 07'S, 116°08' E, trawled, 60 m, 1981 (WAM S 13642). Description. Shell medium size for genus (to 114.4 mm SL), fusiform, stocky, with swollen body whorl, relatively broad but short spire, and long, slender siphonal process. Protoconch (Pl. 4, Fig. 3d) glassy, of 2+ whorls; first whorl smooth with convex sides, flattened top and immersed tip; remaining 1+ whorls smooth, little wider than first, with con- vex sides; final whorl ornamented with 5-6 fine axial riblets extending from suture to suture before abrupt terminus. Teleoconch of about 8 whorls, with sculpture of axial ribs crossed by spiral cords; 10 ribs on first whorl, increasing to 12 on body whorl, ribs evanescent by about sixth whorl, replaced by sharply pointed, axially-elongate knobs at periph ery of whorls; about 5 spiral cords on early whorls, increasing to 8 on penultimate whorl; cords on sutural ramp broad, flat- tened, nearly smooth, those crossing peripheral knobs and abapical halves of whorls much stronger; body whorl with 4-6 low cords adapical to periphery; peripheral band of sharp knobs connected by prominent thin, sharp-topped spiral cord; 2-3 very strong cords with intermediate weaker ones abapical of peripheral band, strongest of these connecting numerous, lower knobs at junction with posterior section of body whorl, followed by single large and small cords on abapical slope of body whorl. Siphonal process with about 10 strong widely- spaced transverse cords extending to tip. Suture adpressed; abapical whorls overlapping suture with nearly smooth, cur- tain-like, 2-mm wide band marked by fine axial lines. Aperture subovate; outer lip subangulate at terminus of periphery; sinus small but distinct, formed by cord emerging from within aperture; parietal shield glossy, detached from axial midpoint of aperture to near abapical end of siphonal canal in mature specimens; inner lip with emergent continu- ous lirae, terminating at lip in about 5-8 denticles produced by termini of cords of body whorl. Siphonal canal open, slightly sinuous. Shell exterior cream colored; whorls 5 through 8 with dark brown axial dashes or spots atop peripheral knobs, most prominently on penultimate and body whorls; dark markings usually split by sharp peripheral cord; larger abapi- cal cords of body whorl marked with many subequally spaced brown spots; scattered pale brown lines or spots on siphonal process, shell interior white. Periostracum, operculum and radula unknown. Distribution. Monte Bello Islands off northern Western Australia to Darwin, Northern Territory (Arafura Sea); Philippines? Etymology. The specific name is from mattia, a Latin noun meaning mace, the spiked club of weaponry, and the Latin suffix-eus, meaning pertaining to; the name notes the resemblance of the shell of this species to a mace. Remarks. Marmorofusus matteus spec. nov. shares with its congeners a white or cream colored shell with prominent dark markings. Like those congeners, whorls of its spire are angled near the center, where they are ornamented by a prominent spiral band of peripheral nodes or knobs; large, broad spiral cords that are flattened on the sutural ramp but elevated on abapical halves of the whorls; and a long, slender siphonal process. The principal difference between M. matteus spec. nov. and all of its congeners is its relatively short, broad spire, reminiscent of the western Atlantic genus Heilprinia Grabau, 1904, but Heilprinia lacks prominent peripheral nodes on its whorls. Marmorofusus matteus spec. nov. also can be distin- guished from M. brenchleyi, M. hedleyi and M. natalensis by its prominent black-brown peripheral nodes with lighter interspaces between them. Shells of the latter three species have white or cream peripheral nodes with brown interspaces between them. Shells of M. matteus spec. nov. resemble those of M. nicobaricus in having dark spots on peripheral nodes, not in interspaces, but the species is distinguished from M. nicobaricus by its broader, relatively shorter spire, its usual lack of axial streaks, and its smaller maximum size (114.4 vs 189.1 mm SL). Body whorls of paratypes 3 and 4 differ from others by having reduced, nearly obsolete peripheral nodes, conferring to the body whorl a more rounded appearance and accentuating a resemblance to Heilprinia both shells also have faint brown axial streaks on the body whorl and siphonal process, unlike other conspecifics. The largest shell we examined (114.4 mm SL) is not fully mature, having a thin outer lip and an underdeveloped parietal shield lacking an elevated and detached abapical portion, suggesting that the species may attain at least slightly greater size. We have most confidence in locality data for M. matteus spec. nov. from northem Australia. The holotype was collected near the Monte Bello Islands, and that locality is supported by another specimen in the Western Australian Museum. The shell figured by Wilson (1994) is from Nickol Bay, east of the Monte Bello Islands, and it is not a far reach from there to Darwin on the Arafura Sea, suggesting that the species may range across northern Australia in intermediate shelf depths (-40-60 m). Records from the Philippines are more problem- atic. Paratype 1 was purchased from a dealer who obtained it in the stock of another dealer who specialized in Philippine shells; the original label read only "Fusinus sp. Palawan." Likewise, paratypes 3 and 4 were originally labeled "Philippines," but with no other data. Until more evidence is forthcoming, we question the locality "India" reported by Mallard & Robin (2005) for the specimen they figured.