ILLUSTRATIONS 



The plates marked with an asterisk appeared in "Nebula to Man.", 

 FRONTISPIECE . ... Alice B. Wood-ward 



CAMBRIAN PERIOD 



PACK 



MARINE INVERTEBRATE LIFE . . . Alice B. Wood-ward 19 



ORDOVICIAN PERIOD 

 MARINE INVERTEBRATE LIFE . . . Alice B. Wood-ward 22 



SILURIAN PERIOD 



MARINE INVERTEBRATE LIFE . . . Alice B. Wood-ward 34 



OSTRACODERMS . . . ,, ,, . 36 



DEVONIAN PERIOD 



OSTRACODERMS AND ARTHRODIRAN FISHES . Alice B. Woodward 38 

 SHARKS AND GANOIDS . . ,, ,, . 40 



CARBONIFEROUS PERIOD 



VEGETATION . . ... Ernest Bucknall 50 



STEGOCEPHS . . . . ,, ,, . 59 



PERMIAN PERIOD 



PAREIASAURUS AND INOSTRANSEVIA . Alice B. Wood-ward 61 



EDAPHOSAURUS . . . . ,, ,, . 63 



GANOIDS AND INVERTEBRATES . . . ,, ,, . 64 



TRIASSIC PERIOD 



VEGETATION . ... Ernest Bucknall 70 



ICHTHYOSAURS . . .. . Alice B. Wood-ward 79 



JURASSIC PERIOD 



* MARINE INVERTEBRATE LIFE . . Alice B. Wood-ward 86 



VEGETATION . ... Ernest Bucknall 88 



xi 



