966 The American Naturalist. [November, 
My first object after observing my height above the river and 
the colored lines of stratification, with their inference of a val- 
ley-filling flood, was to note all evidence in proof of the quater- 
nary age of the gravels, and of the occurrence in them of the 
chipped specimens and fossil bones that had made the spot 
famous. : 
I carefully examined every cut at the Leon, Chemin de 
Poste, and Menchecourt quarries, and afterward searched those 
at St. Acheul and Chelles, and the Archeological Museum of 
the University of Pennsylvania now contains three apparently 
artificial chips, whieh I then found in place; (1) Museum 
number 11456 with 3 facets on one side, showing the bulb of 
percussion, and well worn or worked on the edges, found and 
photographed in place 11 meters below the surface at the 
Chemin de Poste quarry ; (2) Museum No. 11454 apparently 
artificial with 6 facets on one side, in place 2} meters below 
the surface at the Chemin de Poste quarry, and (3) Museum 
No. 11456, a thin flake showing the bulb and concentric 
circles of percussion, at the Leon quarry 2 meters below the 
surface. But the flint nodules of Abbeville flake very easily 
when struck against each other, and when we realize that the 
gravel deposits have been “ ravined ” by streams in past time, 
that eavities have been formed in the chalk, into which the 
flints have fallen with more or less suddenness and force, and 
that the original deposition of the strata must have been 
accompanied with some jostling of nodules, we need not 
attribute every flake showing the bulb of percussion, to the 
hand of man. : 
These specimens though far more artificial looking than 
many that have been proved artificial by surrounding circum- 
stances must therefore be classed as doubtful, and we will not 
perplex ourselves with an analysis of their position in its 
exact relation to unstratified Limon Rouge and the stratified 
beds beneath. 
Beyond these possible traces of human handiwork, I found 
nowhere a fossil or “coup de poing " in place. 
However, atthe Leon quarry, a workman showed M. du Mesnil 
myself 3 typical leaf-shaped specimens, recent] y found, he said, 
