974 The American Naturalist. [November, 
is plainly told. The considerably specialized results of the 
stone chipper’s work at Spiennes, are shown in the two groups, 
and B. 
Of A—a long, narrow blade, worked to a point—I have 7 
broken examples, and of B—the chipped celt—worked toa 
round cutting edge, 8 specimens likewise broken. Both A and 
B are plainly ushered in by a series of rude, less-specialized 
shapes, group a (of which there are 36) tending toward A, 
and group b (of which I have 35) tending toward B." 
When we come to group C, representing a series of inchoate 
masses, 19 in number, too little worked to be classified with 
the rugged relatives of either A or B, we realize a self-evident 
fact often before forced upon our attention. Having descended 
too far in the scale of chipped forms, we have lost our bear- 
ings. Judgment by type is at an end. Inference is danger- 
ous. We have reached the point where the fortunately-dis- 
covered hearth, the blackened potsherd, or half-eaten bone 
must. help to tell the tale—the point where all stones flaked 
. but of a few chips, like “all cats in the dark,” are alike. 
And the fact that this group C, from Spiennes, certainly 
runs into and resembles the rude drift forms from the Somme 
(Fig. 3, C) the American quarry-refuse specimens above 
. noted, and Trenton Specimens (Fig. 4) means but little, when 
we observe, as we must, that the most specialized forms from 
the Spiennes quarry (Fig. 6, A and B) and Drift (Fig. 3, A and 
B) are quite unlike. Here we infer, if we may infer anything 
from the shape of worked stones, that where the quarry man 
was aiming at a thin, elongated blade, or a celt with round 
cutting edge, the Drift Man was working out a broad, leaf- 
shaped form, or the unique massive ended “coup de poing.” 
12 Two broken, poltahed celts, (group B) were obtained by me from à 
peasant at Nouvelles, 13 miles away. But a peasant at Spiennes spoke 
of finding polished celis near the pits. So does Canon Greenwell, quoting 
M. M. Cornet and Briart in Journal of London Ethnological Society, 1871, 
p. 433. 
* The above numbers are given as they, from my own observation, seem to 
show roughly the Main oo among the refuse, between the more 
finished and rude form 
