l record, 27;
Macculloch, 124 _n._;
Macleay, W. S., 202;
Magendie, 117;
Malthus, xv, 7, 88, 90;
Marr, Dr, xxix;
Marshall, 65;
--on sheep and cattle, 78 and _n._;
--on horns of cattle, 207;
Mivart, criticisms, 128 _n._;
Mozart as a child, his skill on the piano compared to instinct,
19 _n._;
Mueller on consensual movements, 113;
--on variation under uniform conditions, (2), 62;
--on recapitulation theory, 219;
Murchison, 145 _n._;
Newton, Alfred, 132 _n._;
Owen, R., xxvii, 219;
Pallas, 68, 69;
Pennant, 93 _n._;
Pliny on selection, 67;
Poeppig, 113 _n._;
Prain, Col., xxix;
Rengger, sterility, 100;
Richardson, 132 _n._;
Rutherford, H. W., xxix;
St Hilaire on races of dogs, 106;
--on sterility of tame and domestic animals, 12, 100;
Smith, Jordan, 140;
Sprengel, 233;
Stapf, Dr, xxix;
Strickland, xxvii;
Suchetet, 97 _n._;
Thiselton-Dyer, Sir W., xxix, 167;
Wallace, xxiv, xxix, 30, 170 _n._;
Waterhouse, 125, 126;
Western, Lord, 9, 65, 91;
Whewell, xxviii, 200;
Woodward, H. B., 145 _n._;
Wrangel, 119 _n._;
Zacharias, Darwin's letter to, xv

Barriers and distribution, 30, 154, 157, 178

Bees, 113, 117;
combs of Hive-bee, 19, 121, 125, 126

Beetles, abortive wings of, 45

BIRDS, transporting seeds, 169;
feeding young with food different to their own, 19, 126;
migration, 123, 124;
nests, 120, 121, 122, 126;
of Galapagos, 19, 159;
rapid increase, 88;
song, 117

BIRDS, NAMES OF:--Apteryx, 45, 236;
Duck, 46, 61, 65, 128, 224 _n._;
Fowl, domestic, 59, 82 _n._, 97, 113, 114, 217;
Goose, 72;
--periodic habit, 124 _n._;
Grouse, hybridised, 97, 102;
Guinea-fowl, 79;
Hawk, sterility, 100;
--periodic habit, 124;
Opetiorynchus, 83;
Orpheus, 31;
Ostrich, distribution of, 158;
Owl, white barn, 82;
Partridge, infertility of, 102;
Peacock, 79, 97, 102;
Penguin, 128 _n._, 237;
Petrel, 128 _n._;
Pheasant, 97, 102;
Pigeon, 66, 82, 110 _n._, 113, 114, 116, 117, 129, 135;
_see_ Wood-pigeon;
Rhea, 158;
Robins, increase in numbers, 88, 90;
Rock-thrush of Guiana, 93;
Swan, species of, 105;
Tailor-bird, 18, 118;
Turkey, Australian bush-turkey, 121 _n._, 122;
Tyrannus, 31;
Water-ouzel, 18 _n._,