Fig. 58. Four typical forms of the Chellean coup de poing, or 'hand-stone,' from the ancient quarries of St. Acheul. About one-half actual size.
a. Disc-shaped—upper left.
b. Oval—upper right.
c. Poniard-shaped—lower left.
d. Almond-shaped—lower right.
In the collection of the American Museum of Natural History.
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