CONTENTS:  1. Introduction; 2. Protozoa : Characters and Classification; 3. Class 1. Sarcodina; Type 1. Amoeba proteus; 4. Class 1. Sarcodina (Contd.) Type 2. Entamoeba histolytica; 5. Class 1. Sarcodina (Contd.) Type 3. Elphidium (= Polystomella); 6. Class 1. Sarcodina (Contd.); 7. Class 2. Mastigophora Type 1. Euglena; 8. Class 2. Mastigophora (Contd.) Type 2. Trypanosoma; 9. Class 2. Mastigophora (Contd.); 10. Class 3. Opalinata (Protociliata) Example : Opalina; 11. Class 4. Sporozoa Type 1. Plasmodium (The Malarial Parasite); 12. Class 4. Sporozoa (Contd.) Type 2. Monocystis; 13. Class 4. Sporozoa (Contd.) Type 3. Eimeria (= Coccidium); 14. Class 4. Sporozoa (Contd.); 15. Class 5. Ciliata Type 1. Paramecium (The Slipper Animalcule); 16. Class 5. Ciliata (Contd.) Type 2. Vorticella (The Bell Animalcule); 17. Class 5. Ciliata (Contd.); 18. Subclass Suctoria; 19. Body Coverings and Skeletons in Protozoa; 20. Locomotory Organelles and Locomotion in Protozoa; 21. Nutrition in Protozoa; 22. Reproduction in Protozoa; 23. Economic Importance of Protozoa; 24. Parasitism in Protozoa; 25. Protozoa and Diseases; Important Questions; Bibliography; Index.