Rabbits, 41, 101;
domesticated, 137;
introduced into Australia, 140.
Races, human,
age of, 178;
divisions of, 183-195;
character of:
status, variations of, 180, 181;
color, a criterion of racial relationship, 181, 184;
hair, character of, as means of classification, 181, 182;
cranium, shape of, as means of identification, nose, jaws, 182.
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.