CONTENTS OF THE PLATES. 



PLATE I Fig.]. Spirula australis. 2. Octopus cirrhosus. 3. Ar- 

 gonauta Argo. 



PLATE II. Fig. 4. Nautilus umbilicatus. 5. Hyalea globosa. 

 6. Pneumodermon diaphanum. 



PLATE III Fig. 7. Clio borealis ; a. ventral aspect; b. dorsal 

 aspect ; c. tunic opened. 7. Intestines. 



PLATE IV. Fig. 8. Cleodora lanceolata, with its shell. 9. Cym- 

 bulia Peronii. 10. Helix Cepa, back and front. 



PLATE V Fig. 11. Achatina fasciata. Fig. 12. Limnea octan- 

 fracta, of the natural size, and with the oral surface magnified. 

 13. Segmentina lineata; b. natural size ; a. c. magnified. 



PLATE VI Fig. 14- Auricula Mydse. 15. Ampullaria virescens. 

 16. Testacilla Maugii, a. 6. aspects of the shell. 17. Testacilla 

 haliotoidea, a. 6. aspects of the shell. Achatina purpurea. 



PLATE VII Fig. 18. Planorbis nitidus; b. natural size ; a. c. mag- 

 nified. 18. d. Segmentina lineata. 19. Ancylus lacustris. 

 2. Scyllea pelagica. 21. Tritonia Hombergii. 



PLATE VIIL Fig. 22 Glaucus radiatus. 23. Dolabella Rhum- 

 phii shell. 24. Chiton squamosus. 



PLATE IX. Fig. 25. Fissurella annulata. 26. Parmophorus aus- 

 tralis. 27. Bulla aperta, with the shell. 



PLATE X. Fig. 28. Trochus Pagodus. 29. Turbo rugosus. 

 30. Natica plicata. 31. Velutina la?vigata. 32. Delphinula cal- 

 car. 33. Delphinula Lima. 34- Scalaria pretiosa. 



