Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/331

Rh *Chalk-formation, surface of, muck denuded, 137
 * Chalk, residue of, forming a superficial deposit, 138
 * fragments of, soon buried and corroded, 139
 * formation of mould over, 297
 * Chedworth, Roman villa of, 197
 * Circular trenches near Stonehenge, 287
 * Claparède, structure of the intestines of worms, 19
 * on the salivary glands of worms, 42
 * on the calciferous glands, 44
 * 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
 * Débris, 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
 * Digaster, 246