| CHAPTER | | PAGE | | I.— | From Known to Unknown | 1 | | II.— | Review of the Position | 8 | | III.— | The Problems Presented | 22 | | IV.— | Initial Variations and Total Experience | 30 | | V.— | Method of Proof | 36 | | VI.— | Evidence from Arrangement of Hair | 39 | | VII.— | The Evolution of Patterns of Hair | 50 | | VIII.— | Can Muscular Action change the Direction of Hair in the Individual? | 64 | | IX.— | Habits and Hair of Ungulates | 74 | | X.— | Habits and Hair of Ungulates | 86 | | XI.— | Habits and Hair of Carnivores | 92 | | XII.— | Habits and Hair of Carnivores | 98 | | XIII.— | Habits and Hair of Primates | 103 | | XIV.— | Miscellaneous Examples | 115 | | XV.— | Experimental | 124 | | XVI.— | First Summary | 140 | | XVII.— | Varieties of Epidermis | 145 | | XVIII.— | Arrangement of the Papillary Ridges | 157 | | XIX.— | Flexures of the Palm and Sole | 170 | | XX.— | The Evolution of a Bursa | 178 | | XXI.— | The Plantar Arch | 192 | | XXII.— | Muscles | 200 | | XXIII.— | Innervation of the Human Skin | 218 | | XXIV.— | The Building of Reflex Arcs | 231 | | Summary | 257 | | Index | 259 |
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