. Popular science monthly. sand a recent loess (Fig. 4). Chellean industry occurs in the gravel,Acheulian industry in the old loess, and Mousterian and Solutreanindustry in the recent loess. That a considerable period elapsed be-tween the deposition of these two loess deposits is proved by the pres-ence of the so-called Km on rouge at the top of the old loess, representingan old land surface, just as the brick earth at the top of the recent loessrepresents a decalcified land surface—the present one. The fourthterrace, the one last to be formed, is only 20 to 28 meters above the sea,!the 8 mete
. Popular science monthly. sand a recent loess (Fig. 4). Chellean industry occurs in the gravel,Acheulian industry in the old loess, and Mousterian and Solutreanindustry in the recent loess. That a considerable period elapsed be-tween the deposition of these two loess deposits is proved by the pres-ence of the so-called Km on rouge at the top of the old loess, representingan old land surface, just as the brick earth at the top of the recent loessrepresents a decalcified land surface—the present one. The fourthterrace, the one last to be formed, is only 20 to 28 meters above the sea,!the 8 meters representing the thickness of the terrace (Fig. 5). Begin-ning at the bottom, it is composed of coarse gravel with Chellean in-dustry; a whitish layer of sand and gravel containing an ancientMousterian industry associated with a warm fauna (Elephas antiquus,Rhinoceros merckii, Hippopotamus) ; a sterile layer of fine gravels; andlastly a thick deposit of recent loess with two horizons of later Mous-terian industry. ! H. PL. III. Male Figure in Bas Relief, Aurignacian age; rock shelter of Laussel.(Dordogne). After Lalanne, LAnthropologie, XXIII., 147, 1912. MAN, HIS ENVIRONMENT AND HIS ART 15 Across the Channel in the Ouse valley, at Piltdown, Fletching(Sussex), there has recently come to light a flint-bearing gravel with aremarkable association of human osseous and cultural remains withthose of a Pliocene and Quaternary fauna (Pliocene elephant, Masto-don, Hippopotamus, Cervus elaplius, beaver, horse). The gravel bed is80 feet above and a mile removed from the present bed of the plrvsiographic features of this region have suffered no appreciablechange since Eoman times, hence the relation of the present Ouse bedto the one that existed when the Piltdown gravels were deposited indi-cates a great antiquity for the latter. All the relics in it are certainly
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