PLATE VII. 



{Oligocene and Miocene Series.) 



Figure 1. Euspatangus eostratus, d'Archiac and Haime (page 47). Abactinal view, 



2. Actinal view. 



3. Posterior view. 



4. The apical system, magnified. 



5. A large tubercle, magnified. 



6. Part of a poriferous zone, magnified. 



7. A linear longitudinal section. 



8. A less excised variety. 



9. Troschelia tuberculata, Duncan and Sladen (page 67). Abactinal view. 



10. Actinal view. 



11. Ornamentation of odd ambulacrum, magnified. 



12. A tubercle, magnified. 



