82 A GUIDE FOR THE STUDY OF ANIMALS 



10. Describe any five different Crustacea. 



11. Describe the work done by the United States gov- 

 ernment and by the state governments to protect and to 

 perpetuate the lobster. Why is it thought necessary to 

 do this .'' 



12. Discuss the process and the advantages and disad- 

 vantages of molting, as seen in the Crustacea. 



13. Name two advantages in having such a shell as 

 Crustacea have. Name two disadvantages. On the whole, 

 is such a shell favorable to an animal's chances of success 

 or is it not .' 



14. Give the curious myth about goose barnacles. 



15. What Crustacea are parasitic.'' Give an account of 

 one. 



16. Why are barnacles classed among Crustacea .' Where 

 were they once classed ? Why may they be considered de- 

 generate, even though not parasitic .' How do they man- 

 age to succeed .' What is their economic importance ? How 

 are their effects checked or prevented ? 



17. Describe some of the odd means of self-protection 

 shown among Crustacea. 



18. Describe a compound eye. Give two theories as to 

 what can be seen .with a compound eye. Why do we not 

 know, instead of theorizing ? 



19. What is the economic value of the very small Crus- 

 tacea ? 



20. Discuss the value to man of the various forms of 

 Crustacea. 



