Opalia australis
(Lamarck, 1822)
Shell: moderately small, solid, turriform, ranging from 25-34 mm.
Whorls Joined. Spire high to very high, about 64%-96% of shell height; suture impressed. Sculpture: smooth; 8-10 costae per whorl with each costa being low, rounded and aligned between whorls.
Aperture ovate.
Exterior colour white, chalky.
