142 POPULAR CONCHOLOGY. 



They are found in the Indian seas. 



15. Chitonellus. — Shell divided into 

 several small, disunited pieces, placed in nearly 

 a straight line down the back of the animal. 



which, in form and manner of progression, re- 

 sembles a caterpillar. — There are 4 recent 

 species. 



The animal of the Chitonellus can move with 

 great rapidity, turning its body with ease both 

 to the right and left, as it creeps on the stalks 

 of marine plants. It is found only in the seas of 

 Australia and the Philippine Islands. 



16. Chiton. — Shell boat-shaped, composed 



of about eight transverse pieces, folding over 

 each other at their edges, and inserted into a 



