It is also possible that the specimen is a fossil, in which case additional large species must be considered. Epitoniids have calcite shells, so they may look nice even though most associated shells are just holes in the rock. Jung, 1971, reports a new fossil Sthenorhytis from Carriacou, though smaller than the modern pernobilis.
Dr. David Campbell
"Old Seashells"
Biology Department
Saint Mary's College of Maryland
18952 E. Fisher Road
St. Mary's City, MD 20686-3001 USA
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"Mollusks murmured 'Morning!'. And salmon chanted 'Evening!'."-Frank Muir, Oh My Word!