• Introduction • General Principles of Systematics (Taxonomy) and Animal Classification • Protoplasm • Cell-Structure and Function • Cell Division • Reproduction • Gametogenesis • Fertilisation • Parthenogenesis • The Invertebrates • Phylum Protozoa • Euglena • Trypanosoma • Amoeba • Entamoeba • Elphidium (= Polystomella) • Monocystis • Eimeria • Plasmodium • Paramecium • Vorticella • Protozoa: Characters, Classification and Types • Protozoa in General • Phylum Porifera • Leucosolenia • Scypha (=Sycon) • Porifera: Characters, Classification and Types • Porifera in General • Metazoa • Phylum Coelenterata (Cnidaria) • Hydra • Obelia • Aurelia • Metridium (Sea Anemone) • Coelenterata: Characters, Classification and Types • Coelenterata in General • Phylum Ctenophora • Phylum Platyhelminthes • Dugesia (=Euplanaria) • Polystoma • Fasciola (A Liver Fluke) • Taenia (A Tapeworm) • Platyhelminthes: Characters, Classification and Types • Platyhelminthes in General • Phylum Aschelminthes • Ascaris (A Common Roundworm) • Ancylostoma (A Common Hookworm) • Wuchereria (A Filarial Worm) • Aschelminthes: Characters, Classification and Types • Nematodes in General • Helminth and Human Diseases • Phylum Entoprocta (Endoprocta) • Phylum Nemertinea • Phylum Acanthocephala • Phylum Rotifera • Phylum Ectoprocta (Bryozoa) • Phylum Brachiopoda • Phylum Phoronida • Phylum Mollusca • Pila (Apple Snail) • Lamellidens (Unio) (Freshwater Mussel) • Mollusca: Characters, Classification and Types • Mollusca in General • Phylum Annelida • Neanthes (=Nereis) (Clamworm) • Pheretima (Earthworm) • Hirudinaria (Indian Cattle Leech) • Annelida: Characters, Classification and Types • Annelida in General • Phylum Arthropoda • Palaemon (= Macrobrachium) Prawn) • Scorpion • Periplaneta (Cockroach) • Grasshopper or Locust • Culex and Anopheles: The Mosquitoes • Musca: The Housefly • Apis: The Honeybee • Bombyx: The Silkworm • Cimex: The Bedbug • Termites: The White Ants • Arthropoda: Characters, Classification and Types • Arthropoda in General • Peripatus • Phylum Echinodermata • Asterias: A Sea Star • Echinodermata: Classification, Characters and Types • Echinodermata in General • Phylum Hemichordata • Hemichordata: Characters, Classification and Types • Glossary • Selected References • Index