We would assign the minimum prehistoric date of 16,000 B. C. for the beginning of the Magdalenian culture, and since we have assigned to the beginning of the Aurignacian culture the date of 25,000 B. C., we should allow 9,000 years for the development of the Aurignacian and Solutrean industries in western Europe. INTRODUCTION. INDUSTRIAL AND ARTISTIC DEVELOPMENT Well as this culture is known, its origin is obscured by the fact that it shows little or no connection with the preceding Solutrean industry, which, as we have noted (p. 331), seems like a technical invasion in the history of western Europe and not an inherent part of the main line of cultural development. Thus Breuil(1) observes that it appears as if the fundamental elements of the superior Aurignacian culture had contributed by some unknown route to constitute the kernel of the Magdalenian civilization while the Solutrean episode was going on elsewhere. Again, early Magdalenian art bears striking resemblances to the superior Aurignacian art of the Pyrenees, especially the parietal art, as shown by comparing the Aurignacian engravings of Gargas with the early Magdalenian of Combarelles. Moreover, the same author observes that, if there is one certain prehistoric fact, it is that the first Magdalenian culture was not evolved from the Solutrean--that these Magdalenians were newcomers in western France, as unskilful in the art of shaping and retouching flints as their predecessors were skilled. Ancient Magdalenian hearths are found in many localities close to the levels of the upper Solutrean industries with their shouldered spear points (_pointes à cran_) and highly perfected flint work. Yet the Magdalenians show a radical departure from the Solutrean type of flint working; both in Dordogne (Laugerie Haute and Laussel) and in Charente (Placard) the splinters of flint are massive, heavy, badly selected, often of poor quality, and poorly retouched, sometimes almost in an Eolithic manner; at the same time, the chance flints, that is, the piercers and graving-tools made from splinters of any accidental shape, are abundant. To these people flint implements appear to be altogether of secondary importance; although the flints are very numerous, they are not finished with any of the perfection of the Solutrean technique; the laurel-leaf spear head and shouldered dart head have disappeared entirely, but a great variety of smaller graving and chasing forms are employed for fashioning the implements of bone and horn. What a contrast to the beautiful flints so finely retouched and of such carefully selected materials, found in the very same stations in middle and upper Solutrean layers!