Light (A, B) and scanning electron (C-I) micrographs of Nebela tincta. (A-C) View of many specimens to illustrate variability in shape and size of the shell. (D) Broad lateral view to show general shape (E) Narrow lateral view. (F) Apertural view showing lateral pores. (G) Close up view of aperture to illustrate aperture outline and collar of organic cement. (H) Broad lateral view of apertural region. (I) Detail of shell surface showing shape and arrangement of shell-plates.