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INDEX.

ABBEVILLE, discoveries at, 199.
Abbott, Dr. C. C., palæolithic implements discovered by, 203.
Abortive organs, 116.
Acceleration, law of, 46-48.
Africans, eastern, morals of, 191.
Agassiz, Professor Louis, on embryonic reminiscences, 114.
Albinism, 54.
Allen, Grant, on primitive man, 218, 220.
Allen, J. A., on variation among birds, 20.
Amblystoma, 44, 45.
Ammonites, variation among, 149–155.
Ameba, 105, 106.
Ancon sheep, 15, 16.
Animal kingdom, partial classification of, 243-245.
Antiquity of man, testimony of history to, 192, 193.

possible remoteness of, 213-218.
Ants, intelligence of, 184, 185.

maintenance of, by acacias, 96.
Apes, physical resemblances of, to man, 180-183.
Archæopteryx, 135–137.
Arietidæ, Professor Alpheus Hyatt on genesis of, 150–155.
Artemia, 32-34.
Australia, extinction of species in, 72-74.

fauna of, 167.

rabbit in, 73, 74.
Axolotl, 43, 44, 45.

BABBITT, Miss Franc. E., on palæolithic implements, 212.
Bacteria, rate of reproduction in, 59, 60.
Baer, Von, on similarity of young embryos, 113, 114.
Baker, Dr. Frank, on human maladaptations, 186.
Bates, H. W., discoverer of mimicry among butterflies, 87.
Beliefs, early, usually erroneous, 222.
Belt, Mr., on tree-frogs, 85.

on ants on acacias, 96.
Birds, color changes in, 39.

distribution of, 165.
variation among, 20.
wingless, 71.

Blood-corpuscles of sea snails, 110.
Boar compared to domestic hog, 37.
Bock, Carl, on wild men of Borneo, 190.
Borneo, wild men of, 189, 190.
Boundaries of zoological regions, 162–164.
Brains of men and of apes, Huxley on, 182, 183.
Brain-capacity, human, 182.
Brain-development, history of, 173-176.
Branchipus, 32-34.
Brine-shrimps, 32-34.

Schmankiewitsch on, 32-34.
British Isles, fauna of, 168.
Brontotherium, brain of, 174.
Brown-Sequard, Prof., on inheritance of epilepsy by guinea-

pigs, 48.
Burton on morals of eastern Africans, 191.
Bushman, description of, 190, 191.
Butterflies, South-American, 84, 85.

CANSTADT race, 214–218.
Carboniferous age, life of, 128.
Carpenter, Dr. W. B., on variation among the foraminifora, 21.

on far-sight of Mongols and Hottentots, 43.
Cat, crosses of, 49.

length of intestine in, as related to food, 36.
origin of, 14.

of Mombas, 34, 35.
Cats of Paraguay, 35.
Cattle-breeding, 15.
Cave-animals, color, etc., of, 20.

Prof. A. S. Packard on, 40.
Chalk sponges, Haeckel on, 22.
Chesapeake Bay compared to pre-historic Delaware Bay, 210.
Chinch-bug, spread of, 63.
Classification of animal kingdom, partial, 243-245.

vegetable kingdom, partial, 246.
Claypole, Prof. E. W., on Croll's theory, 196.
Clevenger, Dr. S. V., on disadvantages of the upright posi-

tion, 188, 189.
Climate, effect of, on fur, 35.
Clover-leaf, sport in, 17, 18.
Coccyx, an injurious aborted organ, 120.
Codfish, rate of reproduction of, 59.
Color-changes in birds, 39.
Comprehensive types, 137-140.
Conditions of life, changes produced by, 31-48.
Connecticut River, terraces of, 198.
Cope, Prof. Edward D., on man as a mammal, 175, 176.

on acceleration and retardation, 46-48.
Correlated variation, 54-56.

Creation, Linnæus's views of, 5.

Milton's views of, 6.

special, inconceivable, 238.
Creation-theory, and distribution, 172.
Cresson, Hilborne T., on palæolithic implements, 212.
Croll, Jaines, on date of the first glacial period, 196.
Crust, earth's, age of, 123, 124.
Cultivation, effects of, on plants, 13, 14.
Cycads, 141, 142.

Dalton, on wild men of Borneo, 190.
Dana, Prof. James D., on early life of the globe, 7.

on geological time-ratios, 125.
Danaidæ, 84, 85.
Darwin, Charles, on coloration of fruits, 88, 89.

announcement of principle of natural selection by, 229, 230.
on early views of origin of species, 224.
on destruction of birds by cold, 66.
on effects of food on structure of animals, 36, 37.
on black-shouldered peacock, 53.
on Porto Santo rabbits, 60, 61.
on destruction of beans by frost, 68.
on law of succession of types, 144, 145.
on loss of wisdom-teeth, 36.
on struggle for existence, 58.
on tuco-tuco, 41.

position of, as an investigator, 230-234.
Darwin, Erasmus, on origin of species, 226.

on sexual selection, and struggle for existence, 231, 232.
Dawkins, W. B., on river-drift inen in Britain, 201–203.
De Candolle, A., on oaks, 19.
Decoy resemblances, 84.
Deer, relation of, to wolves, 62, 63.
Delaware Bay, condition of, at close of glacial period, 206–212.
Delaware river gravels, remains of palæolithic man in,

203-212.
Development theory, general acceptance of, 237–241.

definition of, 8.
Devonian age, life of, 128.
Distribution, laws of, 166, 167.

in relation to special-creation theory, 171, 172.
Dog, crosses of, 49.

origin of, 14.

varieties of, 49.
Domesticated animals running wild, 75.
Domestication, variation of animals under, 15.
Double flowers, 13.
Doubtful species, 19.
Dove, Mr., on Tasmanians, 191.

EARTH's crust, age of, 123, 124.
Egg, human, 177.

mammalian, 109–113.
Egypt, permanence of species in, 4.
Ehrenberg, failure of, to distinguish nature of volvox, 109.
Embryo, early stages of, 109–113.
Embryos, similarity of all young, 111-114.

environment, intluence of, 32-48.
Eohippus, 147-149.
Eozoic age, life of, 125.
Europe, extent of, during tertiary, 193, 194.

extent of, at beginning of quaternary, 194.
Evolution, Huxley on proof of, 28.

testimony of vegetable kingdom to, 247-251.
Evolutionists, number of, before 1858, 228.
Existence, struggle for, 58-69.
Eye, human, defects of, 187, 188.
FERTILIZATION of flowers, 92-96.
Fishes, distribution of, 165, 16

protective coloration among, 80.
Floral structures, origin of, 99, 100.
Flowers, double, 13.

fertilization of, 92–96.
Fly attacking quadrupeds of Paraguay, 64.

tsetse, 64.
Food, effect of, in producing variation, 35-39.
Foraminifera, 132, 133.
Forests, alternation of, 65, 66.
Four-handed, monkeys not, 181, 182.
Fracture, zone of, 160.
Fruits, coloration of, 88–89.
Fur, effect of climate on, 35.

GAR-PIKES, number of species of, 21.

survival of, 138.
Gastrula-stage of embryos, 111, 112.
Genus, definition of, 3.
Geological record, imperfection of, 156.
Gilbert, G. K., on age of Niagara gorge, 196.
Gill-arches, 118, 119.
Glacial period, first, date of, 195, 196.
Glacier, Greenland, 195.
Glaciers of Europe in quaternary, 194, 195.

of North America in quaternary, 194.
Gray, Dr. Asa, on natural selection, 69.
Guyot, Prof. Arnold, map of zone of fracture, 161.
HAECKEL, Prof. Ernst H., contributions of, to the develop-

ment theory, 236.

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