Part 28

Mueller, 293.

Mutation theory, 146.

Naegeli, 143, 148.

Natural Selection, doctrine of, 116, 117, 118; the struggle for existence, 124, 125; simply trial and error, 131; Darwin recognized it as incomplete, 142; germ-plasm theory supplements, 145.

Nebula, gaseous, 84.

Nervous systems, 201, 202, 205, 206, 211; of worker-bee, 232.

Niagara, 85, 86, 89.

Ontogeny, recapitulates phylogeny, 63.

Orang-outang, 163, 164.

Orders, 32.

Organic, 15; systems, 17; transformation, analogies of, 43, a real and natural process, 55, 56, 76; mechanism, alteration of, 55.

Organisms, living, 14; analysis of, 16; 17, 18, 19, 26, 28, 29, 31, 32; characteristic early stages, 55; are they adapted by circumstances? 109; environment, 111; physical heritage of, 113; variation of, 119; difference, 121; universal conflict of, 127; change, 130; human, 32, 156, 159, 165-171; nervous system of, 201; psychical characteristics of, 202; many-celled, 257.

Organs, 16, 17, 28; of human body, 156.

Origin of Species, 136, 149.

Origination of new parts, 109.

Osborn, 148.

Ostrich, 44.

Over production, 122-124, 129.

Owls, horned, of Arizona, 45; 139.

Palaeontology, 32, 34, 73, 74, 76; evidence of, not complete, 80, 81; table of facts of, 91; 94; second division of evidence, 95; does it throw light on antiquity of man? 155; of mind, 202, 203, 217.

Paludina, 95.

Partulae, 103.

Pearson, Karl, 6, 7, 142, 147; heredity of mental qualities, 232.

Penguin, a counterpart of the seal, 44.

Peoples, fusion of, 178, 179; Mexicans, 178, 181; Anglo-Saxon, 179; American, 179; Indians, 181, 183, 185, 191, 192; Patagonian, 180, 192; Polynesian, 181, 182, 187; Moor, 181; Zulu, 181, 183; Malay, 181, 183, 190; Mongolian, 181, 186-190; Papuan, 182; Negro, African, Ethiopian, 182, 183, 192-195; Caucasian, 182, 185-189, 195; Veddahs, 182, 188; European, 183; Asiatic, 183; Laplander, 183, 190; Scandinavian types, Norwegians, Swedes, Danes, Germans--north and south--186, 187; types of, 186-196; Persians, 186, eastern, 187; Afghans, Hindus, 186; Welsh, French, Swiss, 187; Russians, 187-190; Poles, Armenians, 187; Mediterranean type, Spaniard, Italian, Greek, Arab, 187; subordinate group, Semitic, Arab, Hebrew, 187; North African, Berber, Hamites, 187; relatives of the Mediterranean, Dravidas, Todas, Veddahs, Ainus, 188; Manchurian, Chukchi, Buryats, Yukaghir, 189; Finlander, Bulgar, Magyar, Korean, Japanese, Gurkhas, Burmans, Annams, Cochin Chinese, Tagals, Bisayans, Hovars, 190; Pueblos, Eskimos, Aztecs, Mayas, Caribs, 191; Yahgan, Alacaluf, 191; Papuan, Australian, 193; Negrito section, Adamans, Kalangs, Sakais AEtas, Bushmen, Hottentots, Akkas, 194.

Periods, Triassic, Jurassic, 94; Eocene, Miocene, 96.

Phenacodus, 96.

Phyla, 32.