CONTENTS. vii 



CHAPTER YII. 



COI^CLUSION. 



Summary of the part which worms have played iii the 

 history of the world — Their aid in the disintegra- 

 tion of rocks — In the denudation of the land — In 

 the preservation of ancient remains— In the pre- 

 paration of the soil for the growth of plants — 

 Mental powers of worms — Conclusion . 305-313 



Index 315-326 



