CONTENTS:  1. Introduction; 2. Characters and Classification; 3. Class 1. Asteroidea (Contd.) Type : Star Fish or Sea Star (Asterias rubens); 4. Class 1. Asteroidea; 5. Class 2. Ophiuroidea (Contd.) Type : Brittle Star; 6. Class 2. Ophiuroidea; 7. Class 3. Echinoidea (Contd.) Type : Sea Urchin (Ehinus); 8. Class 3. Echinoidea; 9. Class 4. Holothuroidea (Contd.) Type : Sea Cucumber (Cucumaria); 10. Class 4. Holothuroidea; 11. Class 5. Crinoidea (Contd.) Type : Feather Star (Antedon); 12. Class 5. Crinoidea; 13. Coelom & Coelomocytes in Echinodermata; 14. Water Vascular System in Echinodermata; 15. Larval Forms in Echinodermata; 16. Origin & Phylogeny of Echinoderms; Important Questions; Bibliography; Index.