Do not have a clue which chiton this is as it is white and searching for white chiton will not bring up a white chiton. Living under a rock in a tidal gut.
This little California chiton (about 10 mm) is fairly common on the bottom of rocks partially buried in sand. In addition to its distinctive off-white color, the foot is an unusual pinkish- red color. All in all, it can't be confused with any other local chiton