ottom of mammalian scale, 43.

Ectoderm, 255.

Egg, of common fowl, 60;
of frog, 68;
nuclei contains factors of development, 71; 144, 145;
human, 231.

Eimer, 148.

Elements, chemical, 15.

Elephant, 41;
place in zooelogical science, 95; 96, 97;
age of, 124.

Embryo, of frog, 58;
of chick, 60-62, 63, 64, 65;
embryos of carnivora, rodents, hoofed animals alike in earlier
development, 65;
of cat, dog, rat, sheep, rabbit, squirrel, cattle, pig, 65;
of skate, shark, hammerhead, 66;
the human, 168, 170, 171;
of birds, reptiles, amphibia, 171;
human hemispheres of brain like adult cat or dog, 215.

Embryology, 32, 33, 34;
of no form fully understood, 57;
general principles of, 57-67;
embryonic agreement, 65;
of insects, 67;
weight of facts of, 69;
comparative, a distinct division of zooelogy, 70, 71; 76, 94, 100;
evidence of, 170;
of mind, 202, 214;
in early stages of human, no nervous system present, 214;
development of, 215.

English sparrow, 123, 127.

Environment, 111, 112;
influences of, 126;
determines mode of life of a race, 213.

Epoch, Glacial, 86;
Silurian and Devonian, rich array of types, 93;
Cenozoic, 96.

Erosion, 89.

Eskimo, picture-writing, 223.

Ethics, 281;
biological, 283;
natural, 284;
evolution of, 285.

Ethnology, 177.

Evolution, the Doctrine of, 1;
is it a science, 3;
the conception of, 8;
organic, 10-12; 31, 32;
evidence of, 54, 95;
of amphibia, 62;
of birds, 63;
of protozoa, 69;
theory of, supported by palaeontology, 76;
cosmic, 84;
biological evidence of, 91;
three important elements of, 109;
adaptation, variation and inheritance, 110;
mechanical, 109;
dynamics of, 109;
second element of, 122;
human, 150-196; 174;
physical, of man, falls into two groups, 153;
of human races, 176;
racial, 177, 178;
mental, 197-240;
human faculty as a product of, 212;
mental as real as physical, 214;
of brain, 214-217;
of art of writing, 223;
method of mental, 231;
social, 241;
of societies of insects, 258;
human, biological interpretation of, 267-274;
of higher human life, 278-311;
of ethics, 285;
final conception of, 307-311.

Factors, primary, secondary, 110;
three kinds, 111;
congenital, 113.

Falls of St. Anthony, 86.

Fishes, lowest among common vertebrates, 46;
trunk-fish, cow-fish, puff-fish, mouse-fish, flounder, 46;
mo