LEPAS BARNACLE. 209 



cartilages that connect the valves and the 

 peduncle are usually of a reddish orange colour ; 

 the valves are blueish white ; the length is about 

 an inch and a half, the breadth of the largest 

 part is an inch; the peduncle is sometimes a 

 foot long. 



This species is found in all parts of the world, 

 adhering in great quantities to the bottom of 

 ships. It attaches itself particularly to wood : 

 sometimes pieces of timber are thrown on shore 

 completely covered with it. A most strange 

 idea formerly prevailed, that the Barnacle goose 

 was produced from these shells. 



QUESTIONS ON THE MULTIVALVE 

 SHELLS. 



1. How is the generic character of Multi- 

 valve shells determined ? 



2. What is the generic character of the Pholas ? 



3. Why is the Pholas now generally consi- 

 dered as a Bivalve shell ? 



4. What are the habits of the Pholades ? 



5. How is the Phoias supposed to perforate 

 the different substances it inhabits ? 



6. What is the generic character of the 

 Chiton ? 



7. Describe the habits of the Chiton. 



P 



