CONTENTS: 1. Animal Diversity and Taxonomy; 2. The Invertebrates; 3. Protozoa: Characters, Classification and Types; 4. Protozoa: General Account; 5. Organization of Metazoa; 6. Porifera: Characters, Classification and Types; 7. Porifera: General Account; 8. Coelenterata: Characters, Classification and Types; 9. Coelenterata: General Account; 10. Platyhelminthes: Characters, Classification and Types; 11. Taenia solium: The Pork Tapeworm; 12. Phylum Nematoda: Characters, Classification and Types; 13. Ascaris lumbricoides: The Common Roundworm; 14. Helminthes: General Account; 15. Annelida: Characters, Classification and Types; 16. Annelida: General Account; 17. Arthropoda: Characters, Classification and Types; 18. Arthropoda: General Account; 19. Mollusca: Characters, Classification and Types; 20.  Mollusca : General Account; 21. Echinodermata: Characters, Classification and Types; 22. Echinodermata: General Account; 23. Phylum Chordata: An Introduction; 24. Hemichordata: Characters, Classification and Types; 25. Subphylum-II. Urochordata; 26. Subphylum-III. Cephalochordata; 27. Protochordata: General and Comparative; 28. Agnatha: Class Cyclostomata; 29. Superclass Pisces and Fish General; 30. Class Chondrichthyes: The Cartilaginous Fishes; 31. Class Osteichthyes: The Bony Fishes; 32. Class Amphibia; 33. Amphibia: General Account; 34. Class Reptilia; 35. Snakes: General Account; 36. Class Aves: The Birds; 37. Aves : General  Account;  38.  Class Mammalia;  39.  Mammalia:  General Account