From the evidence contributed by these examples the main characteristics of the two groups may be indicated, although, owing to the imperfection of the records, any generalisations must necessarily be tentative and subject to criticism.
Homo primigenius.
The La Chapelle skull recalls many of the primitive features of the "ancestral types." The low receding forehead, the overhanging brow-ridges, forming continuous horizontal bars of bone overshadowing the orbits, the inflated circumnasal region, the enormous jaws, with massive ascending ramus, shallow sigmoid notch, "negative" chin and other "simian" characters seem reminiscent of Pithecanthropus and Homo Heidelbergensis. The cranial capacity however is estimated at over 1600 c.c., thus exceeding that of the average modern European, and this development, even though associated, as M. Boule has pointed out, with a comparatively lowly brain, is of striking significance. The low stature, probably about 1600 mm. (under 5½ feet) makes the size of the skull and cranial capacity all the more remarkable. "A survey of the characters of Neanderthal man—as manifested by his skeleton, brain cast, and teeth—have convinced anthropologists of two things: first, that we are dealing with a form of man totally different from any form now living; and secondly, that the kind of difference far exceeds that which separates the most divergent of modern human races[39]."
Homo recens.
The earliest complete and authentic example of "Aurignacian man" was the skeleton discovered near Combe Capelle (Dordogne) in 1909[40]. The stature is low, not exceeding that of the Neandertal type, but the limb bones are slighter and the build is altogether lighter and more slender. The greatest contrast lies in the skull. The forehead is vertical instead of receding, and the strongly projecting brow-ridges are diminished, the jaw is less massive and less simian with regard to all the features mentioned above. Especially is this difference noticeable in the projection of the chin, which now for the first time shows the modern human outline. In short there are no salient features which cannot be matched among the living races of the present day.
Human Culture.
On the cultural side no less than on the physical, the thousands of years which the lowest estimate attributes to the Early Stone Age were marked by slow but continuous changes.
Reutelian, Mafflian, Mesvinian.
The Reutelian (at the junction of the Pliocene and Pleistocene), Mafflian and Mesvinian industries, recognised by M. Rutot in Belgium, belong to the doubtful Eolithic Period, not yet generally accepted[41].
Strepyan.