H ) 



CHAP. IV. 



MULTIVALVES: 



Chiton. Lepas. Pholas 



Q. DESCRIBE the generic character of the? 

 Chiton, or coat or mail. 



A. The shells composing this genus are easily 

 distinguished from all others, being of an oval 

 form, somewhat resembling the common wood- 

 louse. They cover the back of the animal, and 

 are generally composed of eight pieces called 

 valves, connected by an elastic cartilage, and 

 surrounded by a narrow belt or margin, which is ' 

 sometimes covered with scales. 



Q. Describe the generic character of the Le- 

 pas, Acorn-shell, or Barnacle. 



A. The shell is multivalve, apexed by the base, 

 valves unequal, erect. Lepades are of various 

 forms, though mostly resembling a truncated 

 cone. They adhere by means of a gelatinous 

 fluid which exudes from their bodies .to rocks ^ 



