Lateral areas are defined but not sharply raised. They possess radiating series of bifurcating grooves as does the anterior valve. The central areas are cut longitudinally with from 10-13 sharp lines. Both lateral and central areas have the 'pitted' color pattern. The color of the valves is quite variable, ranging from a clean grey-wh9te to a mottled black and white or green and white.
Some specimens are solid in color.
The girdle is of medium width and is covered with fairly large, smooth scales typical of Chitonidae. The color is cream with green bands. This large intertidal chiton can reach four inches in length. The valves are generally eroded and five the chiton a round-backed appearance. The color is greyish-green to greyish brown.