Contents: 1. Introduction to invertebrates. 2. Kingdom protista. 3. Phyllumprotozoa. 4. Phylum porifera. 5. Phylum coelenterata (cnidaria). 6. Helminthes: Platyhelminthes. 7. Phylum aschelminths (nematodes). 8. Phylum annelida. 9. Phylum arthopoda. 10. Phylum mollusca. 11. Phylum echinodermata.
