Scanning electron micrographs of Centropyxis cassis. (A) View of many specimens showing variability in shape and size of the shell. (B, C) Apertural view of two specimens to illustrate general shape and shell structure. (D) Dorsal view. (E) Latero-apertural view. (F) Latero-dorsal view. (G) Close up view of aperture to illustrate its oval shape and smooth surface around the aperture. (H) Detail of apertural side to illustrate its smooth surface. (I) Detail of dorsal side to illustrate its rough surface, covered with small to medium sand grains.