326 INDEX. 



Worms, contents of intestines, acid, 51 



their castings, acid, 52 



power of suction, 56 



plugging up their burrows, 58 



intelligence of, 64 



formation of their burrows, 98 



number of, living in a given area, 158 



penetrating ancient walls, 188, 209 



gizzards of, and the trituration of the contained 



stones, 246 



prefer to live in fine earth, 291 



Wright, Mr., on the age of Wroxeter, 221 

 Wroxeter, old Roman town of, 221 



