o 



TABLE OF CONTENTS. 



environment has in producing differences in ani- 

 mals; to cultivate the desire for more extended 

 observations of the relations of animals to the earth 

 conditions. 

 Time. 1-3 periods. 



CHAPTER XXIX. 



THE EVOLUTION OF ANIMALS 3 8 



Objects. To bring together and organize the var- 

 ious suggestions and intimations of evolution 

 expressed in the earlier chapters; to make some 

 analysis of the more important factors that are 

 thought to enter into evolution; to give some of the 

 lines of evidence that have been presented for the 

 truth of the doctrine; to suggest something of the 

 effect it has worked in human thinking. 

 Time. 35 periods. 



CHAPTER XXX. 



ECONOMIC ZOOLOGY 396 



Objects. To bring together the scattered threads of 

 the economic relations of animals found by the stu- 

 dent in the practical exercises and in the descriptive 

 text, and to lead the student to organize them into 

 a system; to make the student realize how impor- 

 tant animals are to man, and why; to cause him to 

 see the fallacy of the idea that all animals were made 

 to contribute to man's welfare; to show to what 

 degree man has wrought changes in animals; to 

 arouse his interest in the various instrumentalities 

 for the destruction of the hurtful and the conserva- 

 tion of the helpful animals. 

 Time. 3-5 periods. 



APPENDIX 409 



INDEX . . 



