Above: Shells from Atlantis seamount, "Seamount 2" DW274, 34°05'N, 30°13.7'W, 280 m (actual size 3.0 mm). Below: Shells from Josephine seamount, "Seamount 1" DW41, 36°40.1'N, 14°14.9'W, 200 m (avtual size 2.1 mm). Adapted from Warén & Gofas, 1996, Haliotis 25: 107-116