C. Miocene.

5. Miocene. About two-thirds of the species of shells extinct. All the mammalia extinct.

D. Eocene.

6. Upper Eocene. Fossil shells of the Eocene period, with very few exceptions, extinct. All the mammaliaof extinct species, and the greater part of them of extinct genera. Plants of UpperEocene indicating a south European or Mediterranean climate; those of Lower Eocenea tropical climate.
7. Middle Eocene.
8. Lower Eocene.

III. Secondary. E. Cretaceous—Upper.

9. Maestricht beds. Yellowish-white limestone. Large marine saurians, etc.

10. Upper white chalk. Marine limestone composed in part of decomposed corals.

11. Lower white chalk.

12. Upper green sand.

13. Gault. Dark-blue marl at base of chalk escarpment. Numerous extinct genera—conchiferous cephalopoda, etc.