Light (A, B) and scanning electron (C-I) micrographs of Euglypha cristata. (A, B) View of several specimens to illustrate variability in shape and size of the shell. (C-E) Lateral view of three specimens to show symmetrical arrangement of shell plates and disposition of spines in centre of the aboral region. (F) View of apertural plates. (G-H) View of aboral region showing spines and their attachment to the shell (I) Detail of shell surface to show overlapping shell plates.