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of the Spy skulls (Fig. 11), had, however, the mandible associated with it, and we can therefore form a better opinion of its general characters. It shows a low, retreating forehead, prominent eyebrows, marked prognathism, no chin and large third molar teeth.
Fig. 11.—Side view of Spy skull (No. 1) (1/3). (After Fraipont.)

The Spy skeletons were discovered in 1886, buried 121/2 feet in fallen debris at the entrance to a grotto in the province of Namur, Belgium. The worked flints found in the cave were of the Moustérien types, and among the fauna represented were Rhinoceros tichorhinus, cave-bear, mammoth, hyæna, etc. No works of art were among the relics, so that the Spy