INDEX.
323
- Perichæta, naturalized near Nice, 106
- Perrier, worms surviving long immersion, 13
- —Perrier, on the calciferous glands, 44
- —Perrier, on the action of the pharynx, 56
- —Perrier, on the burrowing power of worms, 99
- —Perrier, on naturalized worms, 106
- —Perrier, on worms killed by acetic acid, 159
- —Perrier, on the gizzards of worms, 246, 249
- Petioles of Clematis, 77
- —Petioles of the ash, 79
- Pharynx, action of, 56
- Pike, stupidity of, 94
- Pine-leaves used in plugging up burrows, 58, 70
- —Pine-leaves lining burrows, 112
- Pipes, formation of, in the chalk, 137
- Playfair on Denudation, 290
- Ploughed fields, old, 292
- Plugging up of the burrows, 58
- —plugging use of the process, 62
- Prehension, power of, by worms, 56
- Qualities, mental, of worms, 34
- Ramsay, Mr., on the sinking of a pavement undermined by worms, 192
- —Ramsey, Mr., on Denudation, 231
- Remains, ancient, buried by worms, 176
- Rhododendron leaves, 69
- Richthofen on dust deposits in China, 237
- Robinia, petioles of, 81
- Rocks, disintegration of, aided by worms, 240
- —Rocks, triturated in the gizzards of worms, 249
- Rolling down of dry castings, 275
- Romanes, Mr., on the intelligence of animals, 95
