Light (A, B) and scanning electron (C-I) micrographs of Trachelocorythion pulchellum. (A-C) View of several specimens to illustrate variability in shape and size of the shell. (D-F) Broad lateral view of three specimens showing general shape and regular arrangement of shell-plates. (G) Close up view of aperture to illustrate shape and arrangement of apertural-plates and structure of the collar. (H, I) Details of shell surface to show elongated-oval or hexagonal shell-plates.