Acanthochiton hemphilli (Pilsbry, 1893)

This one inch chiton has a girdle which almost covers the valves. The valves are colored red, occasionally spotted with white. The valves are heart-shaped, covered with minute, round, sharply raised pustules, except on narrow dorsal ridge. The girdle is rusty brown, lower edge with a spiculose fringe. There are four tufts of long, glassy bristles near the anterior valve and one on each side of the other valves. The tufts are set in cuplike collars.
Illustrated specimen from the Burghardt Collection