| Nota de contenido: |
1. Introduction and general features
2. External form and habits-Gastropoda
3. External form and habits-Bivalvia and Cephalopoda
4. Mantle cavity and gills
5. Feeding and digestion
6. Blood, body cavity and excertion
7. Sex and reproduction
8. Nervous system, sense organs and behaviour
9. The evolution of the Gastropoda
10. The Bivalbia and their classification
11. The first and last cephalopods |
