Keywords: Conchological Manual Figs 91-98.png External surfaces of molluscs Fig 91 cancellated; 92 coronated; 93 imbricated; 94 pectinated; 95 plicated; 96 decussated; 97 muricated; 98 foliated gutenberg A Conchological Manual 43417 1842 George Brettingham Sowerby II 1812 “1884 PD-old-100 A conchological manual 1842 |