1*04 Proceedings of Royal Society of Edinburgh. [sess. 
Belgium. The worked flints found in the cave were of the 
type known as Mousterien , and among the fauna represented 
were Rhinoceros tichorhinus, cave - hear, mammoth, hyaena, etc. 
No works of art were among the relics, so that the Spy troglodytes 
are justly regarded as belonging to an earlier period than that 
in which the reindeer hunters and artists flourished. 
The larger portion of a lower human jaw (figs. 12 and 13) was 
disinterred in 1865 from the debris in the Trou de la Naulette “ at 
a depth of 4-50 metres beneath the last floor of the cave. Above 
it was a succession of five stalagmitic layers, intercalated with 
