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area of drainage ? 5. Do they contain freshwater or marine 
shells, human or other animal remains, or stone implements ? 
if so, preserve them carefully. 6. Label each specimen with 
the locality at once, and give sections to scale showing the 
exact depth beneath the surface at which the remains were 
found : note the thickness of the various stratified layers above 
them, and obtain asnearly as possible the height above the exist¬ 
ing river. 7. What is the growth of timber upon the terraces ? 
and is there any marked difference in the flora of the 
different terraces ? 8. What is the excavating power of the 
river at the present time, as shown by the damage caused by 
floods ? how high do the floods of the river rise at present ? is 
the present bed of the river rising or sinking ? 9. Should 
opportunity occur, look for implements chiefly at the bottom 
of the gravels between the river-drift and the subjacent 
rocks, in the positions shown by a + in the following 
imaginary section across a valley. 9a. Note whether the 
Fig. 1. 
stone of which the implement is made is a local rock ? 10. 
The following, amongst many varieties, are the two principal 
types which have been found in Europe, in the drift-gravels, 
associated with the remains of elephant, rhinoceros, hippo¬ 
potamus, and other extinct animals : these illustrations are 
contributed by John Evans, Esq., F.R.S. 
