INDEX.
- Acephala, 46.
- Achlamydeous flower, 102.
- Achlya, 85.
- Achorion, 84.
- Acinetæ, 31.
- Acrogens, 91.
- age of, 115.
- Actinozoa, 26.
- tree of, 25.
- Africa, rainy season in, 57.
- Agaricus, 85.
- Age, golden, 177.
- of bronze, 178.
- of stone, 177.
- Algæ, 78.
- age of, 114.
- description of, 79.
- Allantois, 61, 131.
- Alrothallus, 87.
- Alternate generation, 29.
- Amblystoma mavortium, 154.
- Amia, 57, 115.
- Ammonites, 49.
- Amnion, 61, 131.
- Amœba, 21.
- Amphibia, 59.
- Amphioxus, 39.
- relation to Ascidia, 53.
- structure of, 55.
- Anchitherium, 9, 139.
- Anemodonts, 62.
- Anemone, 26.
- description of, 27.
- Angiospermce, 98.
- Anguidæ, 62.
- Animal kingdom, table of, 50.
- Animals, growth of, 11.
- Cenozoic, 109.
- Mesozoic, 109.
- Palæozoic, 109.
- Annelida, 36.
- Anoplothcrium, 73, 122, 140.
- descent of, 9.
- Ant-eater, 76, 137.
- Antheridia, 89, 90, 93.
- Anthers, 97.
- Anthracotherium, 9.
- Anthroceros, 89.
- Anthropology, 162.
- Ants, economy of, 165.
- Ape, 70.
- the ancestor of Man, 175.
- Apetalæ, 102.
- Apteryx, 66, 142.
- Arachnida, 44.
- Arcella, 21.
- Archegonia, 89, go, 93.
- Archegosaurus, 59.
- skull of, 60.
- Archeopteryx, 64, 119.
- Armadillo, 142.
- Articulata, 44.
- structure of, 46.
- Artiodactyla, structure of, 72.
- Artisca, position of the, 38.
- Ascidian, development of, 53.
- structure of, 39.
- Ascomycetes, 87.
- Ascus, 84.
- Aspidogaster, 36.
- Asterophyllites, 116.
- Aurelia, 29.
- Australia, fauna of, 72.
- Aye-aye, peculiarities of, 20.
- Azolla, 96.
- Bat, 70.
- Batrachia, development of, 130.
- fossil, 116.
- two types of, 59.
- Beaver, 70.
- Beetles, natural selection among, 150
- Belodon, 62.
- Beroe, 29.
- Birds, agreement with reptiles, 6.
- classification of, 63.
(187)