xiv CONTENTS 



CHAPTER PAGE 



C. The Microscopists 452 



D. Development of the Subdivisions of Biology . . . 455 



1. Classification 455 



2. Comparative Anatomy 457 



3. Physiology 459 



4. Histology 464 



5. Embryology 466 



6. Genetics 468 



7. Organic Evolution 471 



APPENDIX 



I. A BRIEF CLASSIFICATION OF ANIMALS ... 477 



II. BIBLIOGRAPHY 481 



III. GLOSSARY 492 



INDEX ................ 515 



