CONTENTS:  1. Introduction; 2. Characters and CLassification; 3. Class 1. Monoplacophora Example : Neopilina; 4. Class 2. Amphineura Example : Chiton; 5. Class 3. Scaphopoda Example : Tooth or Tusk Shells; 6. Class 4. Gastropoda Example : Pila globosa (The Apple-Snail); 7. Class 4. Gastropoda; 8. Class 4. Pelecypoda Example : Unio, Lamellidens, or Anodonta (Fresh-water Mussel); 9. Class 5. Pelecypoda; 10. Class 5. Cephalopoda (Contd.) Type 1. Sepia (The Cuttle-fish); 11. Class 5. Cephalopoda (Contd.) Type 2. Loligo (The Squid); 12. Class 5. Cephalopoda; 13. Hypothetical Ancestral Mollusca; 14. Podium or Foot in Mollusca; 15. Respiration in Mollusca; 16. Torsion in Gastropoda; Important Questions; Index; Bibliography.