Part 21

Bear, 38, 39.

Bees, mental life of, 207, 208; nervous system of, 232, 256, 257; organizations of, 260, 261, 262; queen, workers, 262, 263.

Beetles, 67.

Bernier, 183.

Bertillon, 183.

Birds, 44; have they descended from gill-breathing ancestors? 61; evolution of, 63; primitive, 99; embryos of, 171, 200.

Blastula, 68.

Blumenbach, 183.

Bonnet, 70.

Borneo, 164.

Brachiopods, 95.

Brahma, 299, 304.

Brain, 215, 235-240.

Brontosaurus, 94.

Brown-Sequard, 148.

Buddha, 299.

Buffon, 114, 135.

Butterflies, 67, 206, 207, 259.

Carbohydrate, 23, 24.

Carbon, atom, 22; 25, 27.

Carnivora, 35, 37, 38, 39, 40; order of, 157.

Caterpillar, larva of, 259.

Cats, Manx, Angora, Persian, 37, 39; domesticated, 137; intelligence of, 208, 209.

Cattle, products of human selection, 137; resemblance, 157.

Cebidae, true monkeys, 160, 161, 162.

Cells, 19, 20, 21; sex, 144; human, composition of, 156; of ectoderm and endoderm, 255, 256, 257, 258.

Celts, 218.

Cercopithecidae, 160, 162.