CONSPECTUS. 



I. REGNI FOSSILIS Classes. 



II. RELIQUIORUM Ordines. 



HI. Genera. 



IV. Familta. 



Sub Gen. 1. Mammodolitho, 



2. Ornitholitho, 



3. Amphibiolitho, 



4. Ichthyolitho^ 



5. Entomolitho, 



6. Helmintholitho, 



7. Conchyliolitho, 



8. Erismatolitho, 



9. Phytolitha. 



