73
OKAPI AND GIRAFFE (_Coloured Illustration_) 74
DIAGRAM OF A SIMPLE REFLEX ARC IN A BACKBONELESS ANIMAL
LIKE AN EARTHWORM 76
THE YUCCA MOTH 76
Photo: British Museum (Natural History).
INCLINED PLANE OF ANIMAL BEHAVIOUR 76
VENUS' FLY-TRAP 77
Photo: J. J. Ward, F.E.S.
A SPIDER SUNNING HER EGGS 77
Reproduced by permission from _The Wonders of Instinct_ by
J. H. Fabre.
THE HOATZIN INHABITS BRITISH GUIANA 82
PERIPATUS 83
Photograph, from the British Museum (Natural History), of a
drawing by Mr. E. Wilson.
ROCK KANGAROO CARRYING ITS YOUNG IN A POUCH 83
Photo: W. S. Berridge, F.Z.S.
PROFESSOR THOMAS HENRY HUXLEY (1825-95) 86
Photo: Rischgitz.
BARON CUVIER, 1769-1832 86
AN ILLUSTRATION SHOWING VARIOUS METHODS OF FLYING AND
SWOOPING 87
ANIMALS OF THE CAMBRIAN PERIOD 90
From Knipe's _Nebula to Man_.
A TRILOBITE 90
Photo: J. J. Ward, F.E.S.
THE GAMBIAN MUD-FISH, PROTOPTERUS 91
Photo: British Museum (Natural History).
THE ARCHAEOPTERYX 91
After William Leche of Stockholm.
WING OF A BIRD, SHOWING THE ARRANGEMENT OF THE FEATHERS 91
PICTORIAL REPRESENTATION OF STRATA OF THE EARTH'S CRUST,
WITH SUGGESTIONS OF CHARACTERISTIC FOSSILS (_Coloured
Illustration_) 92
FOSSIL OF A PTERODACTYL OR EXTINCT FLYING DRAGON 94
Photo: British Museum (Natural History).
PARIASAURUS: AN EXTINCT VEGETARIAN TRIASSIC REPTILE 94
From Knipe's _Nebula to Man_.
TRICERATOPS: A HUGE EXTINCT REPTILE 95
From Knipe's _Nebula to Man_.
THE DUCKMOLE OR DUCK-BILLED PLATYPUS OF AUSTRALIA 95
Photo: _Daily Mail_.
SKELETON OF AN EXTINCT FLIGHTLESS TOOTHED BIRD, HESPER
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