LIST OF TINTED ILLUSTRATIONS 
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I. NEBULA IN ORION. Yerkes Observatory . . . i 
II. SPIRAL NEBULA. Lick Observatory ... 2 
III. CELL DEVELOPMENTS. Alice B. Woodward ... 6 
IV. CAMBRIAN MARINE LIFE. Alice B. Woodward . . 1 1 
V. SILURIAN MARINE LIFE. Alice . Woodward . . 15 
VI. FISHES OF THE SILURIAN PERIOD. J, Smit . . 16 
VII. DEVONIAN FISHES (i). J. Smit . . . .23 
VIII. DEVONIAN FISHES (2). J. Smit .... 26 
IX. CARBONIFEROUS FISHES. C. Whymper . . -33 
X. CARBONIFEROUS AMPHIBIANS. J. Smit . . -37 
XI. PERMIAN FISHES. C. Whymper . . . .39 
XII. NAOSAURUS AND OTHERS. J. Smit . . . .42 
XIII. TRIASSIC LABRYNTHODONT. C. Whymper . , 48 
XIV. PAREIASAURUS. J. Smit . . . . .51 
XV. PLESIOSAURS. E. Bucknall . . . -53 
XVI. ICTHYOSAUR. J. Smit ... 54 
XVII. CERATOSAUR. J. Smit . . . . .59 
XVIII. JURASSIC FISHES. C, Whymper . , . .60 
XIX. JURASSIC MOLLUSKS AND CRUSTACEANS. Alice B. Woodward 62 
XX. MEGALOSAURUS. C. Whymper . . . .65 
XXI. FLYING-DRAGONS. C. Whymper . . . .67 
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