CONTENTS 
CHAPTER I 
PAGE 
THE PROBLEM OF ADAPTATION . : F . ‘ . I 
Structural Adaptations . ‘ I 
Adjustments of the Individual to Chases in the civioaniek = 12 
Adaptations for the Good of the Species . ‘i 3 3 - 19 
Organs of Little Use to the Individual. ‘ 22 
Changes in the Organism that are of No Use to the Individual 
or to the Race c 2 . ; . . . - 25 
Comparison with Inorganic Phenomena . x 3 . - 26 
CHAPTER II 
THE THEORY OF EVOLUTION . é ; 7 . ‘ 7 + 30 
Evidence in Favor of the Transmutation Theory. 3 - 32 
Evidence from Classification and from Comparative Anat- 
omy . . F = of os $a Tere eS. Bz 
’ The Geological Evidence . ‘ i . . ‘i - 39 
Evidence from Direct Observation and Experiment . - 43 
Modern Criticism of the Theory of Evolution . : - 44 
CHAPTER III 
THE THEORY OF EVOLUTION (continued) . . < ‘ - 58 
The Evidence from Embryology = F i A ‘ - 58 
The Recapitulation Theory . a : is - . 58 
Conclusions . z 3 s a . é - . 84 
CHAPTER IV 
Darwin’s THEORIES OF ARTIFICIAL AND OF NATURAL SELECTION QI 
The Principle of Selection : ‘ - . 7 s - gt 
Variation and Competition in Nature ‘i 7 é - 104 
The Theory of Natural Selection 5 j j . . 16 
xi 
