Ivory Treesnail

Charles Hedley's original description of this species (based solely on the shell) is as follows:

Shell thin, translucent; contour trochoidal, color waxen white becoming yellowish on the 3rd and 4th whorls, encircled below the suture by an opaque white thread, nowhere are translucent lines or spaces visible. Sculpture: surface of a waxen polish; transverse growth lines can be detected by the unaided eye, and spiral grooves, almost effaced above but plainer on the base, may be deciphered with a lens. Whorls, flattened, regularly increasing, the last constituting five-eighths of the shell's height, angled at the periphery, descending considerably and abruptly at the aperture, gibbous at the point of flexure. Suture impressed. Aperture very oblique, anterior margin waved; columella oblique, wide, extending nearly to the angle of the aperture, subtruncate below. A thin, translucent, shining callus extends over the imperforate axis to the insertion of the anterior margin of the lip. Height 13.5, major, diam. 16, min. diam. 14 mm.

Hab. Bloomfield River, North Queensland.