Acanthochiton fascicularis (Linneus, 1767)

This chiton is elongate, moderately convex. Surface is dull, varying much in color: brown, chocolate, orange, yellow, pinkish or red, sometimes mottled or streaked with white, pale green or brown. Dorsal areas triangular not abruptly defined. The girdle is moderately broad, more or less closely covered with short spicules which are tawny or greyish; and a thick tuft of greenish or whitish bristles at each suture and four such tufts around the head valve. Taken from Pilsbry
Illustrated specimen is from the Burghardt Collection