204 MULTIVALVES. 



of a reddish orange colour ; the valves are blue- 

 ish 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 Multivalve 

 shells determined 1 



2. What is the generic character of the 

 Pholas ? 



3. Why is the Pholas now generally con- 

 sidered as a Bivalve shell? 



4. What are the habits of the Pholades I 



5. How is the Pholas supposed to perforate 

 the different substances it inhabits ? 



6. What is the generic character of the 

 Chiton ? 



7. Describe the habits of the Chiton. 



8. What is the generic character of the Lepas 1 



9. Describe the two families into which the 

 Lepas is divided. 



10. Describe the animal which inhabits the 

 Lepas. 



