| PREFACE | PAGE
v |
| IMPORTANCE AND BEARING OF THE INQUIRY | 1 |
| SPENCER'S EXAMPLES AND ARGUMENTS | 6-44 |
| Diminution of the Jaws | 6 |
| Diminished Biting Muscles of Lap-Dogs | 12 |
| Crowded Teeth | 14 |
| Blind Cave-Crabs | 17 |
| No Concomitant Variation from Concomitant Disuse | 17 |
| The Giraffe, and Necessity for Concomitant Variation | 18 |
| Alleged Ruinous Effects of Natural Selection | 23 |
| Adverse Case of Neuter Insects | 24 |
| Æsthetic Faculties | 29 |
| Lack of Evidence | 34 |
| Inherited Epilepsy in Guinea-Pigs | 35 |
| Inherited Insanity and Nervous Disorders | 36 |
| Individual and Transmissible Type not Modified Alike | 40 |
| DARWIN'S EXAMPLES | 45-100 |
| Reduced Wings of Birds of Oceanic Islands | 49 |
| Drooping Ears and Deteriorated Instincts | 53 |
| Wings and Legs of Ducks and Fowls | 55 |
| Pigeons' Wings | 62 |
| Shortened Breast-Bone in Pigeons | 64 |
| Shortened Feet in Pigeons | 70 |
| Shortened Legs of Rabbits | 70 |
| Blind Cave-Animals | 72 |
| Inherited Habits | 73 |
| Tameness of Rabbits | 76 |
| Modifications Obviously Attributable to Selection | 82 |
| Similar Effects of Natural Selection and Use-Inheritance | 83 |
| Inferiority of Senses in Europeans | 85 |
| Short-Sight in Watchmakers and Engravers | 85 |
| Larger Hands of Labourers' Infants | 87 |
| Thickened Sole in Infants | 88 |
| A Source of Mental Confusion | 91 |
| Weakness of Use-Inheritance | 94 |
| INHERITED INJURIES | 101-118 |
| Inherited Mutilations | 101 |
| The Motmot's Tail | 110 |
| Other Inherited Injuries Mentioned by Darwin | 111 |
| Quasi-Inheritance | 116 |
| MISCELLANEOUS CONSIDERATIONS | 119-143 |
| True Relation of Parents and Offspring | 119 |
| Inverse Inheritance | 123 |
| Early Origin of the Ova | 124 |
| Marked Effects of Use and
ARE THE EFFECTS OF USE AND DISUSE INHERITED?
|
