Description: English: Retidrillia megalacme (Sykes, 1906); family Borsoniidae. Date: 1906. Source:
https://www.biolib.cz/en/image/id281807/. Author: E.R. Sykes (On the Mollusca procured during the “Porcupine” expeditions, 1869–1870. Supplemental notes, part III.).
