D.

DANA, Professor, 169.
Darwin, Mr. Charles, 2, 4, 6, 11, 14,
17-21, 24, 26, 38, 39, 48, 50, 52—
54, 62-64, 66, 67, 74, 99, 106, 111
-113, 121, 130, 133-138, 140-
143, 146, 154-156, 161, 164, 169,
170, 195, 202, 211, 213-215, 221,
232, 236-239, 244, 245, 247, 249,
250, 252, 254, 260, 267, 268, 271,
292, 296, 297, 317.
Datura tatula, 114.
Delhi, setters at, 110.

Delpino, Signor, 242-244.

Democritus, 247, 317, 332.

Density of air for breathing, 111.

Dentition, carnivorous, 124.

Derivation, 273.

Derivative creation, 290, 325.
Design, 298.

Devotion, 217.

Dibranchiata, 84.

Difficulties of problem of specific
origin, 1.

Digits, supernumerary, 138, 202.
Digits, turtle's, 121.

Dimorphodon, 80.

Dinornis, 79.

Feather-legged breeds, 202.
Feejeeans, 225.

Fertilization of orchids, 61.

"Fiat justitia, ruat cœlum," 220.
Fibres of Corti, 60, 321.

Final misery, 219.

Finger of Potto, 118.

Fish, flying, 72.

Fishes, fresh-water, 164.

Fishes, thoracic and jugular, 44.

Fixity of position of limbs, 44.
Flat-fishes, 41, 187.

Flexibility of organization, degrees
of, 134.

Flexibility of mind, 307.
Flies, horned, 105.

Flight of spiders, 74.
Flounder, 41.

Flower, Professor, 184, 266, 326.

Fly-orchid, 62.

Flying-dragon, 73, 178.

Flying fish, 72.

Foetal teeth of whales, 8.
Food, effects on pigs, 112.
Footsteps of Connecticut, 148.
Foraminifera, 209.
Formally moral acts, 220.
Formation of eye and ear, 57.
Forms, substantial, 210, 313.
Four-gilled Cephalopods, 85.
Fowls, white silk, 138.

French theatrical audience, 224.
Fresh-water fishes, 164.

Frogs, Chilian and European, 169.
Fuego, Terra del, 216.

Ꮓ

Hipparion, 109, 151.

Homogeny, 180.

Homology, bilateral or lateral, 177,
185.

Homology, meaning of term, 8, 177.
Homology, serial, 181.

Homology, vertical, 185.
Homoplasy, 181.
Honey-suckers, 102.
Hood of cobra, 56.

Hook-billed ducks, 113.
Hooker, Dr., 170.
Horned flies, 105.
Horny plates, 45-47.
Horny stomach, 92.
Human larynx, 61, 320.
Humphry, Professor, 184, 270.
Hutton, Mr. R. Holt, 227, 229.
Huxley, Professor, 76-78, 80, 82, 83,
106, 117, 123, 148, 153, 154, 159,
184, 194, 264, 283, 314,

Hybrids, mortality of, 140.
Hydrocyonina, 166.

Hyperphysical action, 291.
Hyrax, 201.

Magnificent Bird of Paradise, 104.
Maize, American, 113.
Mammals, 76.

Mammary gland of kangaroo, 48.
Mammary gland, origin of, 53.
Man, origin of, 319.

Man reveals God, 307.
Man, voice of, 61.
Manatee, 46, 197.

Manchamp breed of sheep, 113.
Manis, 196.

Man's larynx, 61, 320.

Many simultaneous modifications, 64.
Marcus Aurelius, 235.

Martineau, Mr. James, 225, 281.
Mastacembelus, 165.

Materially moral acts, 220.

Matter, crystalline and colloidal, 306.
Meaning of word "individual," 2.
Meaning of word "species," 2.
Mechanical theory of spine, 185.
Mediterranean oyster, 99, 110.
Meehan, Mr., 99.
Mexico, dogs in, 111.

Mill, John Stuart, 18, 212, 218, 219.
Mimicry, 9, 33.

Miracle, 331.

Molars, 124.

Mole, 199.

Molière, 263.

Mombas, cats at, 110.

Monkeys, American, 258.
Monster proboscis, 139.
Moral acts, 220.

Mordacia, 166.

Pavo nigripennis, 113.

Peacock, black shouldered, 113.
Peacock, inflexibility of, 134.
Pedicellariæ, 49.

Pelvis, diseased, 205.

Pendulous appendages of turkey, 113.
Perameles, 77.

Periophthalmus, 165.

Perissodactyle ungulates, 123.

Permian, jugular fish, 159.

Perodicticus, 118, 201.

Phalangers, 76.

Phasmida, 101.
Phyllopods, 89.

Physical actions, 291.

Physiological units," 189, 248.
Pigeons' "boots," 203.
Placental mammals, 76.
Placental reproduction, 76, 91.
Plants, tendrils of, 121.
Plates of baleen, 45.
Platypus, 196.

Pleiades, 217.

Plesiosaurus, 120, 149, 201.

Pleurodont dentition, 167.

Pleuronectidæ, 41, 186.

Plotosus, 166.

Poisoning apparatus, 74.

Poisonous serpents, 56.

Polarities, organic, 207, 208.

Political economy, Fuegian, 216.

Polyzoa, 91.

Pompadour, Madame de, 233.

Poppy, variety of, 114.
Porcupine, 197.

Porto Santo rabbit, 113, 137.

Potto, 118, 201.

Pouched beasts, 76.

Powell, the Rev. Baden, 296, 298,

301, 329.

Premolars, 124.

Prepotency, 140.

Primary intuitions, 289, 332.

Primitive man, 231.

Problem of origin of kinds, 1.

Proboscis monkey, 156.

Proboscis of ungulates, 139.

Processes, bird's-head, 91.

Psettus, 165.

Psoriasis, 205.

Pterodactyles, compared with birds,
79.

Pterodactyles, wing of, 73.
Puccinia, 129.

Purpose, 298.

Q.

QUASI-VERTEBRAL theory of skull, 194.

R.

RABBIT of Porto Santo, 113, 137.
Radial ossicle, 199.

Rarefied air, effect on dogs, 111.
Rattlesnake, 56.

Red Bird of Paradise, 103.
Relations, analogical, 178.
Relations, homological, 177.
Reptiles compared with birds, 79.
Retina, 86.

Retrieving, virtue a kind of, 213, 232.
Reversion, cases of, 137.
Rhea, 79.

Ribs of Cetacea and Sirenia, 46.
Ribs of flying-dragon, 73, 178.
Richardson's figures of pigs, 112.
Roger Bacon, 305.

Rudimentary structures, 8, 116.

Sharks, 92.

Shell-fish, beauty of, 61.
Shells of oysters, 99, 110.
Shielded grasshopper, 100.
Silurian strata, 158, 160.
Simultaneous modifications, 64.
Sirenia, 47.

Sir John Lubbock, 225, 291.
Sir William Thomson, 153.
Sitaris, 52.

Six-shafted Bird of Paradise, 101.
Skull bones, 173.

Skull segments, 194.
Sloth, windpipe of, 92.
Smithfield, wife-selling in, 224.
Snow, crystals of, 210.
Sole, 41, 187.
Solenodon, 168.

Species, meaning of word, 2.
Spelerpes, 186.

Spencer, see Herbert Spencer.
Spider orchid, 62.
Spiders, flight of, 74.
Spine of Glyptodon, 124.
Spine, segmentation of, 193.
Squalidæ, 43.

Squilla, 182.