INDEX. 817 



Chalk-formation, surface of, much denuded, 137 

 Chalk, residue of, forming a superficial deposit, 138 



fragments of, soon buried and corroded, 139 



formation of mould over, 297 



Ched worth, Roman villa of, 197 

 Circular trenches near Stonehenge, 287 

 Claparede, structure of the intestines of worms, 19 



on the salivary glands of worms, 42 



■ on the calciferous glands, 41 



• the pharynx adapted for suction, 56 



• doubts whether earth serves worms as food, 



102, 105 



on the gizzards of worms, 246 



Clematis, petioles of, used in plugging up burrows, 58, 



77 

 Cobra-snake, intelligence of, 94 

 Collapsing of old burrows, 118 

 Concluding remarks, 305 

 Concretions of lime in the anterior calciferous glands, 45 



calcareous, use of, 54 



Corals, mud derived from, 256 



Corniche Road, disintegrated castings on, 276, 281 



Croll, Mr;, on denudation, 233 



Crowns or ridges on old ploughed fields, 292 



Currents of air, worms sensitive to, 28 



Dancer, Mr., on the action and number of worms, 146, 



159 

 Deafness of worms, 26 



Debris, over the Roman remains at Silchester, 201 

 Decay of leaves not hastened by the secretion with which 



they are bathed, 38 

 Denudation of the land, 230 

 Depth to which worms burrow, 109 

 Ligaster, 246 



