Leptochiton inquinatus (Reeve, 1847)
This small chiton is oblong-ovate shaped. The lateral areas are concentrically lightly ribbed and finely radiately grooved. The central areas are longitudinally finely ribbed. The valves are whitish, stained with a light brown spot along the jugal ridge of each valve. The girdle is horny. Taken from Pilsbry
Illustrated specimen is from the Burghardt Collection