Racoon, 38.
Rats, 41, 134.
Reason, 203;
in mental life of communal insects, 207.
Religions, 288;
Christian, Hebrew, Buddhistic, Tangaroan, 289, 290;
Mohammedan, 290, 298;
Dervish, Mahdist, 293;
linguistic basis of, 293, 294;
of savagery, 294, 300, 301;
barbarism, civilization, 294;
elements of, 295;
forms of Christianity, 296;
sects,
Judaism, 297, 298;
Brahmanism, Buddhism, 298, 299;
Polytheism, Roman, 300.
Reptiles, variations about a central theme, 45;
lizard, typical, 46; 157;
embryos of, 171; 200.
Retention of better invention, 109.
Rhinoceros, 41.
Rivers,
Mississippi, 86, 89;
Hoang-ho, Ganges, Thames, 87;
alterations made by, 87.
Rocks, crystalline or plutonic:
sedimentary, 85;
eruptive, 88;
new, 59;
of Grand Canon, 90;
testimony of, establishes evolution, 100.
Salamanders, 45, 46.
Salts, of sodium, chlorine, magnesium, potassium, 24.
Samoan Islands, 103.
Sandstone, 90.
Science, what is it? 5, 6;
physiological, 14.
Sea anemones, 68.
Sea elephant, 38.
Seals, 38, 39, 40, 209.
Selection,
natural, doctrine of, 116, 117, 118;
struggle for existence, 124, 125;
simply trial and error, 131, 136,
artificial, 136, 137, 138;
laws of, in mental phenomena, 203.
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