Page:The Formation of Vegetable Mould through the Action of Worms (1881).djvu/330

316 *Bridgman, Mr., on worms eating leaves of a Phlox, 33
 * Buckman, on grasses profiting by being rolled, 10
 * Burial of the remains of ancient buildings by worms, 176
 * Burrows, depth of, 109
 * direction of, on a slope, 270
 * excavation of, 98
 * lined with black earth, 111
 * lined with leaves, 112
 * mouths of, worms lie motionless near, 15
 * old, their collapse, 118
 * plugged up, 58
 * terminating in a small chamber, often lined with stones or seeds, 114


 * Calciferous glands, 17, 43
 * Cannibal worms, 36
 * Carnagie, Mr., depth of burrows, 114
 * Castings, acid, 52
 * from Beaulieu, 101
 * tower-like, near Nice, 106
 * ejection of, 116
 * tower-like, from near Calcutta, 123
 * of great size on the Nilgiri Mountains, 126
 * weight of, from a single burrow and from a given area, 160
 * thickness of layer formed from, during a year, 169
 * ejected over ancient buildings, 253
 * flowing down slopes, 261
 * washed away, 272
 * dry, disintegration of, 275
 * blown to leeward, 283
 * Cells, free, with calcareous matter in the calciforous glands, 47
 * Cellulose, digestion of, 37