This shell appears to be a Common Atlantic Marginella gastropod shell or
Prunum apicinum
(Menke, 1828). It was found by a 17 year old Lucien Pearson Beckner in
1889 at Naples, Florida, USA. Mr. Beckner was a mentor to Professor
James Conkin (1924-2017) and his natural history collection was left to
him upon his
death.
