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Alaginella carinata (Smith, 1891)

Diagnosis: Shell small, opaque white when dead, strongly narrowed anteriorly, whorls sharply angled, sometimes keeled at the angle; spire medium in height; aperture moderately wide; lip thickened internally, smooth or with about  seven denticles, slightly flared posteriorly; external varix present; posterior notch weak; columella with four strong plaits, occupying slightly more than half the aperture.

Size: Adults 6 mm in length

Distribution: Australian Museum Collection: off Sandy Cape, Queensland, to off Ulladulla, NSW, in 457 1153 metres.  Australian Museum holds 16 lots, so probably common in its habitat.

Comparison: Distinctive within the genus because of its keeled whorls and very deep water habitat.

Figs. 1,2:  800 fathoms (1463 m), 35 miles east of Sydney (C.026691). This is the specimen figured by Laseron (1948, fig. 46).


Copyright Des Beechey 2003