PLATE I. 



Shell of the Sepia rugosa- 



Shell of the Calmar. Loligo sagttlattl, Lam. 



4. Nummulites, with sections. 



Discorbite. 



Miliolite cceur de Serpent. 

 Lituolite. 



Transverse and longitudinal sections of a Belemnite. 

 10. 11. 12. Belemnites. 

 Spirolinites . 



Upper and under view, with a section, of the Gyrogonites , 



nula. 



Simplegades colubrinus. 

 Turrilites compressus. 

 Baculiles vertebralis. 

 . a, Spirulafragilis seu australis. 



b. The siphon traversing the chambers. 



c. Section magnified. 



19. Baculiles gigas. 



20. Planospirites ostracinus. 



21. Hippurites cornu-copitu. 



22. Belemnite. 



23. Side roli tes calcitrapoides. 



24. Section of a Belemnite. 



25. Ortkoceratite. 



26. Hippurite with a gutter, c. 



27. Hippurite with a siphon. 



28. Under view of the operculum of a Hippurite, shewing the two prolonga- 



tions resembling a hinge. 



29. Belemnite. 



30. Section of an Ortkoceratite with a siphon passing through the axis. 



31. Hippurite with a gutter, a. and a siphon, b. 



32. Lituites Breynii, found in the marble of OEland : the shaft or straight 



part extends in a length equal to the depth of the Plate, gradually 

 enlarging towards the base. 



33. Hippurite, the operculum pierced with two eyes. 



34. 35. Ortjipcemtites with a siphon towards the edge or periphery. 



