Chiton
Chitons are primitive Ocean|marine molluscs in the class biology class Polyplacophora ormerly the class Amphineura There are 900 to 1,000 living species of chitons Their size ranges from 0.5 to 30 cm in length most are quite small ITIS ID 78807 rename Barnes Barnes Robert D1982. Invertebrate Zoology Philadelphia PA Holt Saunders 381389 ISBN 0-03-0567475 All the living species are in the subclass Neoloricata and so may be called loricates Popular names are sea cradles or coat of mail shells They have a single shell that sticks to rocks, like a limpet The shell is made of hard plates that fit tightly together, overlapping one another The shell plates are surrounded by a structure known as a girdle