Shell is thick, solid and biconic with straight-sided, moderately high spire and equally long tapered base. Protoconch is paucispiral with about two volu¬tions. Tip is depressed, early one and a third volutions are low, round and smooth and the remainder part is sharply carinated at lower two-fifths. A few opisthocyrtly curved weak brephic axials may be present above carina on the last part. Boundary between the protoconch and teleoconch is sharp, indicated by abrupt disappearance of the carina and appearance of opisthocyrt axial ribs which connect two spiral cords, one close to the upper suture and the other at the lower fouth. Teleoconch of the holotype consists of seven whorls. The first whorl is provided with 11 axial ribs, of which the first one is strong but simple. The following axials are progressively accentuated with granular swell both at upper and lower ends, and then the granules are laterally connected by spiral cords. Lower (peripheral) set of cord and granules is much heavier than the subsutural one. Area between the two sets abruptly develops into an infrasutural sulcas in association with weakening of axials on that part. Peripheral cord is bipartited by a shallow groove on the third and later whorls so that each granule is differentiated into upper and lower swells by a median saddle, although the superjacent groove hardly crosses over granules. A weak spiral thread appears respectively on the infrasutural sulcus and between the lower suture and peri¬pheral cord on the third whorl. The latter (suprasutural lira) is increased in its relative size later. Body whorl, occupying 60 percent of the height of the shell, is moderately contracted between the round base and straight snout. Basal surface is covered with cancellation of distinct spiral cords and axial riblets with granules at intersections. Snout is provided with distinct, oblique and simple spiral lirae. Aperture is moderately wide, differentiated into rhomboid aperture proper and moderately long, widely open and terminally truncated canal. Inner lip is covered with callus, which is particularly thick on the columellar part and shows minute striation. Anal sinus is moderately deep, asymmetrically v-shaped with horizontally stretching upper arm and broadly curving lower arm. The upper arm is then turned upward to merge to the upper suture with an angle of about 80 degrees. Apex of the sinus is situated at the border area between the infrasutural sulcus and peripheral cord.

The present species is superficially similar to shorter forms of Gemmula, but is readily distinguished from the latter by clear difference in protoconch and anal sinus. It resembles Paradrillia serana (FISCHER) from the Pliocene of Seram, Indonesia (FISCHER, 1927, p. 34, pl. 78, fs. 71a and b) in the general facies, but the former has shorter shell with stouter sculpture, otherwise they conform to each other.

Australia. Northern Territory. Types found about 100 miles north of Crocker Island.