CONTENTS: 1. Animal Diversity and Taxonomy 2. The Invertebrates: An Introduction;SUB KINGDOM PROTOZOA - 3. Euglena viridis; 4. Trypanosoma gambiense; 5. Leishmania donovani; 6. Amoeba proteus; 7. Entamoeba histolytica; 8. Elphidium crispum (Polystomella crispa); 9. Plasmodium vivax: The Malaria Parasite; 10. Monocystis agilis; 11. Eimeria tenella; 12. Paramecium caudatum: The Slipper Animalcule; 13. Vorticella: The Bell Animalcule;    14. Protozoa : Characters, Classification & Types: 15. Protozoa: General Account; SUB KINGDOM METAZOA — 16. Organization of Metazoa; 17. Origin of  Metazoa; 18. Origin of Bilateria;  

LOWER INVERTEBRATES — 19. Leucosolenia: An Asconoid Sponge; 20. Scypha (=Sycon): A Syconoid Sponge; 21. Porifera: Characters, Classification & Types; 22. Porifera: General Account;  23. Hydra; 24. Obelia: A Sea Fur; 25. Aurelia: A Jelly-Fish; 26. Metridium: A Sea Anemone; 27. Coelenterata : Characters, Classification & Types; 28. Coelenterata: General Account; 29. Ctenophora; 30. Dugesia (Euplanaria): A Planarian Regeneration; 31. Faciola hepatica: The Sheep Liverfluke; 32. Taenia solium: The Pork Tapeworm; 33. Platyhelminthes: Characters, Classification & Types; 34. Super Phylum Aschel- minthes: The Pseudocoelomate Phyla; 35. Ascaris lumbricoides: The Common Roundworm; 36. Ancylostoma duodenale: The Common Hookworm; 37. Wuchereria bancrofti; 38. Nematoda: Characters, Classification & Types; 39. Helminthes: General Account;

HIGHER INVERTEBRATES – 40. Neanthes  or Nereis; 41. Pheretima posthuma : The Indian Earthworm;42. Hirudinaria granulosa: The Indian Cattle Leech; 43. Annelida: Characters, Classification & Types; 44. Annelida: General Account; 45. Palaemon (=Macrobrachium) malcolsonii: The Indian Fresh water Prawan; 46. Palamnaeus: Indian Scorpion; 47. Periplaneta americana: The Common Cockroach; 48. Grasshopper or Locust; 49. Musca domestica: The Housefly; 50. Culex and Anophelis: The Mosquitoes; 51. Apis: The Honey Bee; 52. Bombyx mori: The Silkworm; 53. Arthropoda: Characters, Classification & Types; 54. Arthropoda : General Account; 55. Peripatus; 56. Pila: The Apple Snail; 57. Unio (Lamellidens): Freshwater Mussel; 58. Neopilina; 59. Sepia : The Cuttle Fish; 60. Mollusca; Characters, Classification & Types; 61. Mollusca : General Account; 62. Asterias : A Sea Star; 63. Echinodermata: Characters, Classification & Types; 64. Echinodermata: General Account; 65. Balanoglossus: A Tongue Worm; 66. Hemichordata, Characters, Classification & Types;   Glossary ; Selected References.