occur in the more superficial cavern-deposits, they are not only stratigraphically more recent than the instruments often found imbedded deep below them, but are also associated with a different and more modern fauna, and even with domesticated animals, of which none are as yet known to have belonged to the Palæolithic Period.
M. Gabriel de Mortillet,[1] judging rather from the character of the works of man found in the caves, and from what appears to be the order of superposition in certain cases, than from the mammalian fauna, has arranged them in a manner which to some extent coincides with the views of M. Lartet and Dr. Dupont. To each division he has assigned the name of some well-known deposit, such as he regards as being the most characteristic in its contents.
As M. de Mortillet's classification has now been almost universally accepted, it will be well here to adopt it, though in some respects it differs from the arrangement proposed in my first edition. I there attempted to give references to the works in which the different caves in France and other continental countries have been described, but, at the present day, the number of caves explored is so great, and the literature relating to them so extensive, that I must confine myself to British caves, and make but passing reference to some of those in other countries.
I take M. de Mortillet's arrangement in ascending, and not in descending geological order; that is to say, I here describe the older deposits first. Leaving the Age of Chelles, or, as I prefer to call it, of St. Acheul (Acheuléen), which is characterized by the high-level River-gravels, subsequently described, we come to:—
1. Age of Le Moustier,[2] Dordogne(Moustérien).—Characteristics—Ovate-lanceolate implements much resembling some of those from the River-gravels; large broad implements and flakes worked on one face only into "choppers" or "side-scrapers," like those from High Lodge, Mildenhall; large sub triangular flakes wrought at the edge into spear-head-like and round-ended forms; rough "sling-stones" and flakes; scrapers not abundant.
An almost entire absence of instruments of bone; and a large proportion of those of flint, of considerable size.
