OCCURRENCE OF BONES PARTIAL. 
143 
whose habit it is not to devour the bones, either of their own species, 
or of other large animals. 
4. The partial occurrence of these remains in so comparatively 
small a number of the many caves that lie adjacent to each other, 
added to the immense quantities in which they are usually crowded 
together where they exist at all, shows that they were accumulated 
by some cause independent of the diluvial action that introduced the 
mud and pebbles; for had they been drifted in together with them, 
they would probably have been distributed co-extensively with these 
latter substances, and in small quantities ; whereas, on the contrary, 
whilst we find in every cave nearly the same proportion of diluvial loam 
and pebbles, the occurrence of bones is limited to a small number; 
and in these, they are crowded in such enormous quantities, and are 
attended with such circumstances, as are explicable only on the 
hypothesis of their having existed there before the introduction of 
the diluvium; and in general, the deeper we descend, the more 
abundantly loaded do we find the lower regions and undervaultings 
to be, till they are entirely choked up with mud, pebbles, and bones. 
5. The mud and pebbles were not introduced at a period anterior 
to that in which the caves were inhabited; for in this case, they would 
have found a separate bed at the bottom, beneath the bones, and not 
have been dispersed so equally as they are amongst them: e. g. we 
find the pebbles occur as abundantly at k the top, as at k. k. the 
bottom, and at l, the middle region of the great heap that lies piled 
together to the height of 25 feet in the lowest region of the cave, at 
Gailenreuth. (See Plate XVII.) 
6. The angular fragments of limestone that are found within the 
