Four different views of the same shell of the land snail Arianta arbustorum: apertural view (top left) showing its aperture; lateral view (top right); apical view (bottom left) showing its apex and umbilical view (bottom right).
Four different views of the same shell of the land snail Arianta arbustorum: apertural view (top left) showing its aperture; lateral view (top right); apical view (bottom left) showing its apex and umbilical view (bottom right).