Chitons are marine molluscs of varying size in the class Polyplacophora, formerly known as Amphineura. About 940 extant and 430 fossil species are recognized.
Two individuals of Acanthopleura granulata on a rock at high tide level in Guadeloupe
Loose valves or plates of Chiton tuberculatus from the beachdrift on Nevis, West Indies, head plates at the top, tail plates at the bottom
Prepared chiton shell with structure of plates clearly visible.