The science of life : fully illustrated in tone and line and including many diagrams

CHAPTER III.

GONTENTS

PAGE

THe ERA OF CRAWLING AND SWIMMING :

. The age of the Sea-scorpions . . Echinoderms :

a Phylum which has never produced land forms

. The ancient history of Molluscs . The earliest fish ;

Coal .

The Vertebrata cr awl out of water

A coal-measure erforest

. An age of death

. The conquest of the air . Dinosaurs : : : . Insects multiply as _ plants

develop

. The battle of the giants and the

dwarfs

. The origin and prosperity of the

mammals

. The tangled skein of evolution . Is there progress in evolution ?

Traces of man before and in the Pleistocene period

. The advent of modern man .

The adjustment of inhabitant to habitat

Seashore life 4 Coral reefs and aelamds . ; Holes and corners of sea-life .

§ 1. The opening eras : the Archeo- § 4 zoic and the Proterozoic . . 410 §5 §2. The age of ancient life: the Paleozoic s 12 § 6 § 3. The Cambrian period : Age of 87 Trilobites 413 CHAPTER IV. Lire Conquers THE Dry Lanp §1. The desert land of the early § 4. world . 426 85. § 2. The curious history of the landplant and its seed 426 § 6. $3. The plants of the ancient | wi orld 434 §7 CHAPTER Y. Tue FuLt Conquest oF THE LAN § 1. The reptilian adventurers 447 § 4 §2. A digression upon seal 5 radiation . 450 § 6 § 3. The “ back-to- the-water ” movement 451 87 CHAPTER VI. THe Moprern ERA § 1. Modern life . 468 $3 § 2. The troubled earth of Cenozoic times ; 469 8 4 85 CHAPTER VII. Man Dawns upon THE WORLD 81. Why we say “ man dawns” 481 § 4. 92. The remote ancestors of man . 481 $3. A short history of Pleistocene § 5 and recent climate . . 486 BOOK VI THE SPECTACLE OF LIFE CHAPTER I. Hasirats § 1. Ways and worlds of life . 499 § 4. 82. Habitats and their inhabitants 501 § 3. Ways of getting a living . 503 CHAPTER II. Lire in THe Sra 81. Life in the sea 508 § 5. 92. The surface life of the sea 512 § 6. § 3. The deep sea . , 517 $7. § 4. On the floor of the abyss . 523

EVOLUTION IN THE WATER

PAGE

416 418 422

436 437

442 444

453 457

461

465

470° 475 477

492 494

524 27 529