Contents: Survey of Molluscs, Origin and Evolution of Mollusca, Field Study of Molluscs, Body Wall and Mantle, Molluscan Exoskeleton, Coelom, Locomotory Organs, Locomotion, Digestive System, Respiratory System, Circulatory System, Excretory System, Integrated System, Receptors, Reproductive System, Embryonic Development, Larval Forms in Molluscs, Edible Molluscs, Pearl and Pearl Industry.