Light (A, C) and scanning electron (B, D-I) micrographs of Cyphoderia ampulla. (A, B) View of many specimens to illustrate variability in shape and size of the shell. (C) View of live specimen showing numerous thin filopodia and cytoplasm, fulfilled with many food-particles. (D, E) Lateral view of two individuals to show general shape and regular arrangement of shell-plates. (F) Latero-apertural view. (G) Close up view of aperture. (H, I) Detail of shell surface to show regular arrangement and two types of shell-plates.