THE FORMATION 



VEGETABLE MOULD, 



THROUGH THE 



ACTIOlJr OF WOEMS, 



OBSERVATIONS ON THEIR HABITS. 



CHARLES DARWIN, LL.D., F.R.S. 



WITH ILLTTSTRATIONS. 



•NEW YORK: 

 D. APPLETON & COMPANY, 



1, 8, AND 6 BOND STREET. 

 1888. 



