xiv CONTENTS 



CHAPTER VIII. 



The Flagellata, Euglena viridis ; Structure ; Nutrition ; Repro- 

 duction ; Mitosis ; Encystment. Bodo saltans ; Structure, 

 Conjugation, and Reproduction. Polytoma uvella ; Structure ; 

 Nutrition ; Reproduction ; Exhaustion following on Con- 

 tinuous Reproduction by Binary Division . . . 160-177 



CHAPTER IX. 



The Volvocinse. Pandorina morum, Eudorina elegans, and Vol- 

 vox globator. Macrogametes and Microgametes ; Somatic 

 and Generative Cells ; Parthenogonidia ; Relationship of 

 the Flagellata . . . . . .178-186 



CHAPTER X. 



The Ciliata, Paramecium aurelia and caudatum. Structure, 

 Reproduction, and Conjugation of Paramecium. Alter- 

 nation of Generations ; Immortality of Protozoa . . 187-204 



CHAPTER XL 



The Ciliata (continued) Vorticella monilata. Structure, Repro- 

 duction, and Conjugation of Vorticella. Sex foreshadowed 

 in Vorticella . . . . .205-214 



CHAPTER XII. 



Protozoa and Metazoa. Structure and Development of Zootham- 

 nium. Somatic and Germ Cells. Multicellular Organisms. 

 Evolution of Metazoa . . . . .215-220 



CHAPTER XIII. 



The Ccelenterata, Hydra fusca and Hydra viridis. Structure of 

 Hydra. Ectoderm, Mesogkea, and Endoderm. Nematocysts. 

 Reproduction and Development of Hydra . . . 221-240 



CHAPTER XIV. 



Obelia geniculata. Structure of the Colony. The Medusa, its 

 Structure and Development. Comparison of Medusa ' 

 and Polype. Sexual Development of Obelia. Theory of 

 Individuality ....... 241-254 



CHAPTER XV. 



Classification. Phylum, Class, Order, Family, Genus and 

 Species. System of Linnaeus. Genealogy of Animals. 

 Progress in Classification ..... 255-258 



