QUESTIONS ON BIVALVES. 197 



inequivalve, equilateral, inequilateral, and what 

 is their derivation ? 



4. Describe the mollusk inhabiting bivalve shells. 



5. How is the generic character of bivalve 

 shells determined? 



6. Name the parts of a bivalve shell, and de- 

 scribe the situation of each part. 



7. What is the generic character of the Mya, 

 and what are its distinguishing marks ? 



8. Describe the manner in which the shell of 

 the Mya Margaritifera is peculiarly suited to the 

 situations it occupies. 



9. What are pearls, and in what kind of shells 

 are they found ? 



10. What is the generic character of the Solen, 

 and how is it distinguished ? 



1 1 . Describe the habits of the Solen. 



12. What is the generic character of the Tel- 

 lina, and its distinguishing mark ? 



13. What is the generic character of the Car- 

 dium, and its distinguishing marks ? 



14. Which species of the Cardium afford food 

 to the poorer classes ? 



15. What is the general appearance of the 

 Mactrae ? 



16. What is the generic character of the 

 Donax ? 



17. What is the generic character of the Venus, 

 and its distinguishing mark ? 



18. To what use is the Venus Mercenaria con- 

 verted ? 



