CONTENTS. 



CHAPTEB I. 



GENERAL SKETCH OF THE EARLY PROGRESS IN NATURAL 



HISTORY ........ . 1 



CHAPTER II. 



NOMENCLATURE AND CLASSIFICATION ..... M 



CHAPTEB III. 



CATEGORIES OF CLASSIFICATION ...... 80 



CHAPTEB IV. 



CLASSIFICATION AND CREATION ...... 41 



CHAPTEB V. 



DIFFERENT VIEWS RESPECTING CRDEBft . . 72 



CHAPTEB VI. 



GRADATION AMONG ANIMALS ... M 



CHAPTEB VII. 



ANALOGOUS TYPES 



CHAPTEB VIII. 



FAMILY CHARACTERISTICS ..... . . 109 



