viii CONTENTS 



CHAPTER PAGE 



V. THE CASTOR BEAN, A COMPLEX MULTICELLU- 



LAR PLANT . 103 



The Castor Bean (Ricinus Communis). Gross 

 Structure. Structure of the Stem. Structure 

 of the Root. Structure of the Leaf. Repro- 

 ductive Organs. 



VI. THE PHYSIOLOGY OF A TYPICAL PLANT . .126 

 Photosynthesis or Starch Manufacture. Me- 

 tastasis. Photosynthesis and Metastasis Con- 

 trasted. Miscellaneous Functions of Plant 

 Life. 



VII. MULTICELLULAR ANIMALS: HYDRA FuSCA . . 138 



General Life Functions of Animals. Animal 

 Biology. Hydra Fusca, a Simple Multicellu- 

 lar Animal. The Relation of the Whole Or- 

 ganism to its Different Parts. 



VIII. MULTICELLULAR ANIMALS: THE EARTHWORM 



(Lumbricus) . 155 



Anatomy. Microscopic Anatomy, or Histology. 



J IX. MULTICELLULAR ANIMALS: THE FROG (Rana). 



GENERAL DESCRIPTION . . . . 175 



X. THE PHYSIOLOGY OF AN ANIMAL . . . 204 

 Physiology of the Earthworm. 



XI. THE DIFFERENCES BETWEEN ANIMALS AND 

 PLANTS: THE MUTUAL RELATIONS OF OR- 

 GANISMS . 217 



The Differences between Animals and Plants. 

 Contrast between the Activities of Animals 

 and Plants. The Mutual Relations of Organ- 

 isms. Nature's Life Cycle. 



