CONTENTS. THE BODIES OF SPACE — THEIR ARRANGEMENTS AND FORMATION j CONSTITUENT MATERIALS OF THE EARTH, AND OF THE OTHER BODIES OF SPACE 27 THE EARTH FORMED — ERA OF THE PRIMARY ROCKS . 45 COMMENCEMENT OF ORGANIC LIFE — SEA PLANTS, CORALS, ETC ERA OF THE OLD RED SANDSTONE—FISHES ABUNDANT 66 SECONDARY ROCKS—ERA OF THE CARBONIFEROUS FOR MATION COMMENCEMENT OF LAND PLANTS ... 78 ERA OF THE NEW RED SANDSTONE—TERRESTRIAL ZOO LOGY COMMENCES WITH REPTILES — FIRST TRACES OF BIRDS ERA OF THE OOLITE COMMENCEMENT OF MAMMALIA . 104 ERA OF THE CRETACEOUS FORMATION H7 ERA OF THE TERTIARY FORMATION — MAMMALIA ABUNDANT . 126
