Shell fusiform, thin, spire elevated. Colour drab-grey, with a purplish tinge on the varices. Whorls six, exclu¬sive of the protoconch, rounded, flattened above the shoulder, contracted at the suture. Sculpture : on each whorl are three varices which follow obliquely down the spire. Each varix has at the shoulder a long, simple, upcurved, broad, flattened, hollow spine, bi- or trifid at the tip; from its base springs a short spine, followed by three separate short spines. On the canal are three similar small spines. The last whorl has one, the others two, intervariceal tubercles. The whole surface is overrun by close, spiral, squamose threads, which multiply by intercalation, and become liner on the last whorl. Protoconch smooth, elevated, two-whorled. Aperture round, posteriorly with a tubercle followed by a deep notch, outer lip advanced beyond the varix, crenulated with double denticules on the inner edge. Columella broad, arched, its edge projecting. Canal long, upcurved, slit narrow. Length, 56 mm. ; breadth (without the spines) 23 mm.
Murex cervicornis, Lamarck, was recorded by Brazier as taken by Messrs. H. Prince and T. Haylock off Sydney Heads in 90 fathoms. The specimen referred to is now in the Australian Museum, and certainly belongs to M. damicornis. The only other mention of M. cervicornis on our coast no doubt refers also, to this species. Murex cervicornis ought, therefore, to be erased from the list of New South Wales Mollusca, and M. damicornis substituted for it.
The novelty may be classified as intermediate between M. axicomis, Lamarck, and M. recticornis, Martens.
Dredged in 49-50 fathoms off Coogee; in 19-20 fathoms in the Shoalhaven Bight; and in 63-75 fathoms off Port Kembla.

The shell is moderate in size (maximum length 70 mm) and fusiform. The spire is moderately high to high, consisting of two polished nuclear whorls and six convex postnuclear whorls. The suture is relatively unimpressed. The body whorl is small to moderate in size and fusoid. The aperture is ovate, with an in verted-V-shaped anal sulcus, the V pointing toward the columella and bounded parietally by a strong spiral ridge. The outer apertural lip is erect and finely dentate. The columellar lip is adherent above, slightly detached below. The siphonal canal is shorter than the spire, narrowly open, and distally recurved.
The body whorl bears three foliaceous varices. Additional axial sculpture consists of two or three intervarical ridges, one prominent, the other one or two somewhat reduced. Spiral sculpture consists of major and minor cords and numerous scabrous or finely nodulose threads. Where the cords intersect the varices, open, weakly foliated spines are developed. The shoulder spine is very long and broadly, medially open, with its end broadly bifurcated. Below the shoulder are four major spines and minor intercalating spinelets. The lower two spines are often connected at their bases by a webbing. The canal bears two or three spines.
Shell color is white to pale yellow or buff, in coalescing axial streaks or in a simple suffusion. The aperture is porcelaneous white.

New South Wales to the Gulf of Carpenteria. In Queensland, specimens generally have a significantly shorter spire.