In those sketches we find proofs of observation so scrupulous that we cannot restrain our admiration for the man whose ardent imagination was voluntarily subjected to the toil of study so profound. If the example of Barye, with whom we associate the names of other great modern painters of animals, can determine the conviction which we seek to produce, we shall be sincerely glad. To contribute to the propagation of useful ideas, and to see them accepted, gives a feeling of satisfaction far too legitimate for us to hesitate to say what we should feel if our hope be realized in this instance. ÉDOUARD CUYER. [Illustration: FIG. IV.--REPRODUCTION OF A SKETCH OF BARYE (COLLECTIONS OF ANATOMICAL MUSEUM OF THE SCHOOL OF FINE ARTS--HUGUIER MUSEUM).] CONTENTS INTRODUCTION PAGE GENERALITIES OF COMPARATIVE ANATOMY 1 CHAPTER I OSTEOLOGY AND ARTHROLOGY: THE TRUNK 4 THE POSTERIOR LIMBS 78 THE POSTERIOR LIMBS IN SOME ANIMALS 90 THE SKULL OF BIRDS 127 CHAPTER II MYOLOGY: THE MUSCLES OF THE TRUNK 131 MUSCLES OF THE ANTERIOR LIMBS 162 MUSCLES OF THE POSTERIOR LIMBS 200 MUSCLES OF THE HEAD 232 CHAPTER III EPIDERMIC PRODUCTS OF THE EXTREMITIES OF THE FORE AND HIND LIMBS 247 CHAPTER IV PROPORTIONS PROPORTIONS OF THE HEAD OF THE HORSE 273 CHAPTER V THE PACES OF THE HORSE 282 LIST OF ILLUSTRATIONS FIG. PAGE