CONTEXTS. ■>" 



CHAPTER VII. 



CONCLUSION. 



Summary of tlie part which worms havo played in the 

 history of the world — Their aid in the disintegra- 

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

 the preservation of ancient remains — ^In the pre- 

 paration of the soil for the growth of plants — 

 Mental powers of worms — Conclusion . 306-313 



Ikdbx 315-326 



