INDEX. 325 



Tasto, power of, 32 



Thickness of the layer of mould annually ejected by 



worms, 169 



of the mould over the remains at Chodworth, 199 



of the mould over the remains at Silchester, 218 



of the mould over the Roman remains at 



Wroxeter, 223 

 Thyme, leaves of, not eaten by worms, 33 

 Touch, worms highly sensitive to, 28 

 Triangles of paper, 82 

 Trituration of particles of rock in the gizzards of worms, 



249 

 Tumuli, ancient, 290 

 Tylor, Mr. A., on Denudation, 233 

 Tylor, Mr. E., on anciently ploughed land, 293 

 Typhosolis, 19 



Utricularia, bladders of, 109 



Vibrations, worms sensitive to, 27 

 Vision, power of, in worms, 20 



Walls, ancient, at Ab'nger, penetrated by worms, 188 



penetrated by worms at Silchester, 209 



Washing away of castings, 272 



Wedgwood, Mr., on the formation of mould, 3 



Weight of earth ejected from a single burrow, 160 



Whitaker, Mr., on Denudation, 232 



White, on worms leaving their burrows at night, 14 



Winchester, chalk formation near, 301 



Wind, action of, on castings, 283 



Worms, nocturnal, 13 



large numbers occasionally die, 14 



dead eaten by other worms, 36 



