Part 21

Pteraspis, 28

Pterichthys, 25, 28, 32* mistaken for crab, 25

Pterodactyls, impressions of wings, 133 from Kansas, 55 wing, 72*

Pycraft, W. P., restoration of Archaeopteryx, 89

Radiolarians, 15, 17*

Reconstruction of animals, 127, 130, 134

Reptiles, fasting powers of, 98 growth throughout life, 102 jaws, 53

Restorations, xviii Archaeopteryx, 89* Ceratosaurus, 106* Hesperornis, 82* Mammoth, 176* Mastodon, 210* Phororhacos, frontispiece progress in, 137 Stegosaurus, 108* Thespesius, 90* Triceratops, 126* Tylosaurus, 52*

Reversion of fancy stock, 171

Rhinoceros, exterminated by cold, 232

Roc, legend of, 144, 145

Rocks, thickness of sedimentary, 20

Ruffles on dresses, 202

Schuchert, Charles, on collecting fossils, 17 collector of Zeuglodon bones, 63

Seals, covering of, 128

Sea-serpent, belief in, 56 possibility of existence, 57

Shaler, Professor, on changes in Miocene flora of Europe, 236, 237

Sharks, early, 31 Great-toothed, 65 known from spines and teeth, 29 Port Jackson, 29 teeth of, 69 White, or Man-Eater, 65

Skeleton, basis of all restorations, 127 best testimony of animal's relationships, 124 information to be derived from, 120, 122, 123, 124, 125, 126, 127 a problem in mechanics, 102, 124 reconstruction of, 120 relation of, to exterior of animal, 121, 127 of Triceratops, 103,* 121

Spines and plates, 130

Stegosaurus, description of, 106 restoration of, 108*

Survival of the fittest, 173

Teeth, birds with, 79 of gnawing animals, 169, 200 of grass-eaters, 169

Teeth, of horse, 170 of mammoth, 198, 199* of mastodon, 198, 199* of sharks, 29, 30 of Thespesius, 105

Thespesius, abundance of, 104, 105 brain of, 93 (Same as Claosaurus) engulfed in quicksand, 8 impressions of skin, 132 restoration of, 90* teeth of, 105 at Yale, 109

Tiger, preying on reindeer, 134

Tile-fish, destruction of, 230

Titanichthys, 28, 29