Vii CONTENTS. 
VII. 
LYELL AND MoDERN GEOLOGY—DARWIN'S THEORY OF SELECTION 
— BEGINNING OF LIFE . . . . ° . . . e 
VIL 
HEREDITY—REVERSION—VARIABILITY—ADAPTATION—RESULTS OF 
USE AND DISUSE OF ORGANS— DIFFERENTIATION LEADING TO 
PERFECTION . a . . . . ° ° ° . e 
Ix. 
THE DEVELOPMENT OF THE INDIVIDUAL (ONTOGENESIS) IS A RE- 
PETITION OF THE HIsToRICAL DEVELOPMENT OF THE FAMILY 
(PHYLOGENESIS) . . . . . . . . . ° 
X. 
THE GEOGRAPIICAL DISTRIBUTION OF ANIMALS IN THE LIGHT OF 
THE DOCTRINE OF DERIVATION . . . . . ° . 
, 
XI. 
THE PEDIGREE OF VERTEBRATE ANIMALS. ° ° e . ° 
MAN . ° ° ° ° . . r ry e e e . 
REFERENCES AND QUOTATIONS ,. ° e ry ° ° e ° 
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