9. a. tubular processes passing 10. Species of Mantellia. 3. Fossil strobilus. from the internal part to the surface. 11. 12. Fossil teeth from Stonesfield slate. Palythoa. 1. Dudley fossil, or trilobite. 2. Oniscus prægustator. 3. Part of a jaw from the Stonesfield slate. 4. Stylina, simple. 5. Stylina, compound. 6. One of the five triangular sections into which the crust Fig. 7 Pentamerus. 8. Ordinary fossil tooth of the elephant. 9. Fossil tooth of the elephant, the plates winding and continued. 10. Fossil tooth of the elephant, the plates of extraordinary thickness. of the echinus is separable. 11. Alveolites incrustans. Z z. |