Mongolian idiot, 265.

Mosquito's bite, 97.

Mosquito's mouth, 96.

Mother-love, 217.

Multiplication and evolution, 54.

Mutation and DeVries, 246.

N

Nature of life, 247.

Nature of milk, 214.

Natural selection explained, 45.
in brief, 36.

Nebular hypothesis, 152.

Neck of horse, 229.

Neo-Darwinians, 237.

Nests for warm eggs, 101.

Number and position of breasts, 215.

O

Odor as protection, 117.

Opossum playing dead, 107.

Origin of birds, 181.
feathers, 102.
flight, 122.
hair, 102.
life, 159.
lungs, 177.
milk glands, 212.
placenta, 210.
variations, 50.

"Origin of Species" published, 41.

Orthogenesis and Eimer, 243.

Oxford meeting of British Association, 41.

P

Palaeozoic era, 170.

Paley's Natural Theology, 87.

Pangenesis, 236.

Patagonia and its terraces, 29.

Phenacodus, 185.

Physical evolution of man, 254.

Pithecanthropus, 188.

Planetesimal theory, 155.

Playing dead, 107.

Playing 'possum, 107.

Polygamy in animals, 137.

Pond-snail, development of, 46.

Potato worm, 142.

Protective coloration, 109.

Protoplasm, 164.

Pterodactyl, 180.

Puff adder, 107.

Purpose and adaptation, 89.

Purpose in nature, 88.

Q

Quiet and escape, 105.

R

Raining toads, 113.

Religion and evolution, 74.

Reptiles of Mesozoic, 179.

Reproduction, asexual and sexual, 194.
in fishes, 196.
in frogs, 199.
in reptiles, 202.

Rhinoceros horn, 123.

Romanes and isolation, 242.

Rooster finer than hen, 132.

S

Saint Augustine and evolution, 11.

Salamanders, 176.

Sargent's picture, 289.

Science and the book, 274.

Science and theology, 280.

Science, definition, 280.

Seals and polygamy, 139.

Sealskin and fur, 100.

Sedgwick and Darwin, 24.

Selection and evolution, 56.

Sexual selection, 126, 128.

Skunk's odor, 117.

Sloth and megatherium, 29.

Song and mating, 133.

Sparrow, English, adapted to town, 66.
and hawks, 69.
and winter, 73.
eat varied food, 71.
eye-minded, 78.
feed young on insects, 72.
good qualities, 85.