QUESTIONS ON BIVALVES. 197 



3. What is the meaning of the terms equivalve, 

 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 

 describe 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 Margaratifera 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 ? 



11. Describe the habits of the Solen. 



12. What is the generic character of the 

 Tellina, and its distinguishing mark ? 



13. What is the generic character of the 

 Cardium, and its distinguishing marks ? 



14. Which species of tne 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 

 converted ? 



