Shell tall, slender, thin. Whorls six, slightly angled. Colour grey, obscurely banded with reddish-brown. Sculpture : on last whorl twenty sharp but low radial plications which commence at the sutures and gradually vanish on the base. Both plications and interstices are crossed by regular, evenly spaced, spiral cords, of which the last whorl has twenty, five of which run between the suture and the angle. This sculpture is continued on the earlier whorls, and fades away gradually at the protoconch, which is large, dome-shaped, of two whorls, smooth and glossy. Aperture ovate, outer lip simple; canal short, bent to the left. Columella much arched, overlaid by a callus sheet, its lower extremity furrowed by a deep spiral groove. Length 12 mm.; breadth 5 mm. The specimen here described is immature.
Hab.—Sixteen miles east of Wollongong in 100 fathoms; a few imperfect specimens dredged by Mr. G. H. Halligan and self.
Type.—To be presented to the Australian Museum.
This species is assigned to the genus Phos, in accordance with the views of the late Prof. Tate.* I am not satisfied that this
classification is correct, but adopt it as a temporary expedient pending the receipt of further information. The only known living relation is the Tasmanian Phos tenuicostatus, Ten. Woods, from which the northern shell is discriminated by its small and slender form and less development of longitudinal sculpture.