iv CONTENTS 



CHAPTER PAGE 



VII The Microscopic Plants — Protophyta 47 



Class Isokontae — The Volvox Group — Group Chloro- 

 coccales — The Desmid Group — Class Chrysophyceae — 

 Class Bacillariales (Diatoms) — Class Cryptophyceae — 

 Class Dinophyceae (Peridiniales) — Class Euglenineae 



VIII The Microscopic Animals — Protozoa 70 



Types of Protozoa — Animal Flagellates (Mastigophora) 

 — Characteristics — Reproduction Among Flagellates — The 

 Sarcodina — Characteristics — Rhizopods — Radiolaxia — Re- 

 production Among the Sarcodina — The Infusoria — Char- 

 acteristics — Cilia — Nuclei — Cell Division — Conjugation 

 — Encystment and Endomixis 



IX Functional Activities of Protozoa 88 



Irritability — Respiration — Excretion — Nutrition — Food 

 Getting — Continuous Feeders — Occasional Feeders — Di- 

 gestion of Food — Distribution and Assimilation of Food — 

 Defecation 



X Parasitism Among Protozoa 101 



Adaptation to Environment — Associations for Mutual 

 Good — Harmful Associations — Moving to a New Host — 

 Sporozoa 



XI Organization, Vitality, and Mortality 110 



Life, a Complicated Phenomenon — Periodic Reorganiza- 

 tion — Testing for Vitality — When Does a Young Pro- 

 tozoan Become an Adult? — Differentiation into Male and 

 Female — Continuity of Life 



Suggestions for Further Reading 117 



Glossary 119 



Index 125 



