4. Above this, in the surface soil and disturbed portions of the underlying beds, are remains of the neanthropic period, including twelve species of modern animals, but with no trace of the great extinct quadrupeds. Connected with these were human skulls of the same type found in the ancient burial barrows of England, and belonging to races still extant. The Cresswell caves give no bones of palæocosmic men, but they very well show the succession of the early period of mild climate, the later severe climate, the extinction of the old animals contemporary with the earliest men, and the final succession of modern men and animals to the now insular Britain, which, in the times represented by the beds one, two, and three above mentioned, was a part of the mainland of Europe. [Illustration: FLINT FLAKES OF TWO TYPES FROM PALANTHROPIC AND NEANTHROPIC CAVES IN THE LEBANON] But perhaps the most interesting views of the succession of early men and the gap between the palanthropic and neanthropic periods are presented by the Belgian caves explored by Schmerling and Dupont. The latter has excavated more than sixty caverns, and has carefully noted the mode of occurrence of their contents, collecting at the same time a vast number of bones and implements, now admirably arranged in the museum of Brussels. In Belgium the earlier anthropic period has been characterised as that of the mammoth. The beginning of the neanthropic is still a reindeer age, though that animal was apparently becoming rare. It existed, as we know, in Central Europe till the time of Cæsar. [Illustration: RESTORATION OF THE SEPULCHRAL CAVE OF FRONTAL, BELGIUM (after Dupont) 1. and 2. Gravel and clay of mammoth age. 3. Surface of modern accumulation of angular stones and clay. (D) Slab closing the sepulchre. (S) Platform for funeral feasts. (F) Hearth. (R) Rock forming the walls of the cavern.]