1. Phylum Mollusca

2. There are 5 classes: Class Amphineura – Chitons, 8 shells
Class Gastropoda – ‘Stomach foot’
Class Bivalvia – 2 valves/shells
Class Scaphopoda – ‘tooth-shaped’ shells
Class Cephalopoda – ‘head attached to foot’

3. All members of the Phylum Mollusca have:
Muscular foot
Mantle
Shell
Visceral Mass

4. Class Amphineura Chitons
Have 8 shells
This diagram – dorsal surface

5. Ventral muscular surface
Muscular portion: foot

6. Class Gastropoda
‘Stomach-foot”
Movement done on ‘muscular foot’

7. Class Gastropoda - Snails

8. Snail Diagram

9. Gastropods - Sea slugs/nudibranchs

10. Class Bivalvia
2 shells
Clams
Oysters
Mussels

11. Typical Shell/Valve

12. Class Scaphopoda
Tooth or tusk shaped shells

13. Scaphopoda Diagram

14. Class Cephalopoda

15. Cephalopods have a ‘head’

16. Cephalopods include: Octopi Squid Cuttlefish Nautiluses
Have internal shells
Swim with jet propulsion