970 The American Naturalist. [November, 
scarcely worked at the large end where the nodule surface 
often remains, and finely specialized into a narrow point at the 
other, is, with the exception of the three specimens in Fig. 5, 
(the only ones of the kind from Trenton with a record as to 
depth and position), unlike anything in the described Trenton 
series, nor is it fairly duplicated by any of the American quarry 
or workshop discoveries that I have seen. 
In the Boucher de Perthes Museum there are (down stairs) 
48 specimens of A, (Fig. 3) and 47 of D. Inthe British Museum, 
192 British specimens of A (Fig. 3) and 30 of B. Of C there are 
32 in the Boucher de Perthes, and 97 (from Britain) in the 
British Museum, and the fact that these latter, savein material, 
are exactly resembled by the Trenton forms and American 
quarry specimens, brings us to the next question. 
IMPLEMENTS FINISHED AND UNFINISHED. 
Are the European specimens finished implements? In at- 
tempting to answer which the following facts offer some sug- 
gestion. 
Of the 48 French (Boucher de Perthes, Abbeville) examples 
of A (Fig. 3), all very rude and unworked at base, where 28 
retain the pebble surface, 29 are quite unmistakably special- 
ized at the point ; and of these 29, 10 look freshand unused, while 
19 seem to show signs of use or water wear. Of the 152 Brit- 
ish (Museum) A's, 96 are unmistakably specialized at the point, 
while very rude, and generally showing nodule surface at the 
base. 
Eleven of the 47 French B's (well-specialized all around, 3 
to 5 inches long), show signs of use or rolling. 
Of the 32 French C's about 14 look rolled or used, and of the 
97 British C's (of whieh W. G. Smith's unused-looking speci- 
men resting on the elephant bone, in the “ Paleolithic floor" 
case, is one), about 20 are made, not of flint, but of red 
quartzite. 
Water, rather than use, may have rolled and nicked the edges 
of any of these flints (except, perhaps, W. G. Smith's) since they 
were made, and if we must eliminate these battered cutting 
edges (which I did not look for in the British cases) from the 
