CONTENTS 



CHAPTER PAGE 



INTRODUCTION .... .13 



i ON THE STUDY OF NATURE . .21 



ii. How TO BEGIN 28 



in. THE SEA-URCHIN ... 35 



iv. NATURE'S FIREWORKS 45 



V. THE EUPLECTELLA, OR GLASS SPONGE . . 53 



vi. ATLANTIC OOZE ... ... 71 



VII. FOSSIL POLYCYSTINA . . 79 



viii. RADIOLARIA ... 88 



ix. DIATOMS no 



x. EGGS OF INSECTS, ETC. . .122 



XI. FORAMINIFERA 130 



xn. FRESH-WATER RHIZOPODS ... .138 



xin. CORALS 158 



xiv. THE COMATULA, OR ROSY FEATHER STAR . 170 



xv. THE BUILDING ROTIFER 175 



xvi. THE BEAUTIFUL FLOSCULE AND VOLVOX GLO- 



BATOR 182 



xvii. SNOW AND WINDOW-PANE CRYSTALS . . 191 



xviii. THE EYES OF INSECTS 199 



xix. THE PROBOSCIS OF THE BLOW-FLY . . 203 

 xx. A SEASIDE RAMBLE IN SEARCH OF HIDDEN 



BEAUTIES 207 



