Naticidae (17-21 mm) L to R, Top: Tanea lineata (Röding, 1798) Singapour; Natica rouxi (Nicklès, 1952) Gabon; Middle: N. fulminea 'cruentata' form, Senegal; N. fulminea (Gmelin, 1791) Senegal; Glyphepithema alapapilionis (Röding, 1798) Philippines; Bottom: Naticarius onca (Röding, 1798) Mozambique; Tectonatica violacea (Sowerby I, 1825) Philippines