Trivia caelatura Hedley, 1918
Description: Shell thin, globular, ends not extended, aperture wide. Covered with thin ribs, 18 on the outer lip, interrupted on the dorsum. Dorsum smooth, not grooved. Fossula deep, crossed by ribs. Colour white, dorsal area more opaque than rest of shell.
Size: Holotype 4.5 mm in length.
Distribution: Type locality "80 fathoms off Narrabeen, NSW".
Remarks: This species is known only from two specimens, both from the type locality. The shells are distinctive in the NSW fauna in having relatively few ribs, so it is surprising that additional specimens have not come to light since the species was described in 1918. Perhaps the type lot are aberrant specimens, or an unusual record of a tropical species.
Figs. 1,2: HOLOTYPE Off Narrabeen, NSW, in 80 fathoms (C.025769)
Copyright Des Beechey 2000