TABLE OF CONTENTS. 



INTRODUCTION. 



PAGE 



NATURE AND OBJECTS OF PHYSIOLOGICAL SCIENCE - 



CHAPTER I. 



ON THE PLACE OF MAN IN THE SCALE OF BEING. 



1. Distinction between Animals and Plants 39 



2. General sub-divisions of the Animal Kingdom - - 41 



3. General characters of Radiata 42 



4. General characters of Mollusca - 45 



5. General characters of Articulata - 48 



6. General characters of Vertebrata 50 



7. General characters of Fishes 54 



8. General characters of Reptiles - 55 



9. General characters of Birds 58 



10. General characters of Mammalia 62 



11. Chief sub-divisions of Mammalia 65 



12. Characteristics of Man - 67 



CHAPTER II. 



OF THE MUTUAL RELATIONS OF THE DIFFERENT BRANCHES OF THE HUMAN 



FAMILY. 



1. General Considerations - - 76 



2. On the Discrimination of Species 77 



3. On the possible Extent of Variation within the limits of Species 79 



4. On the Extremes of Variation among the Races of Men 81 



5. On the value of Physiological and Psychological peculiarities as specific distinc- 



tions - - ... 82 



6. On the Comparative Peculiarities of the different Races of Mankind 



7. Of the Principal Branches of the Human Family 91 



CHAPTER III. 



OF THE ELEMENTARY PARTS OF THE HUMAN FABRIC. 



1. On Organized Structures in General 



2. On the Original Components of the Animal Fabric ' 102 



3. Of the Elementary Parts of Organized Tissues; Cells, Membrane, and Fibre - 108 



4. Of the Simple Fibrous Tissues ..... - 120 



