. EXPLANATION OF THE PLATES. 
317 
"Fig. 4, Found in the gravel d (sect. 6, p. 289), April 1860 ; 
depth about 24 feet ; a small flint, with a thick white 
crust, a large portion of which remains, chipped at one 
end only ; colour unaltered. 
Fig. 5. Found in the gravel d (section, p. 292, near spot 
where Mr. Flowee and the author found their speci- 
mens), June 1859; depth about 20 feet; black flint, 
original colour unaltered ; vitreous lustre. 
Fig. 8. Found in the gravel d, April 1859; depth uncer- 
tain ; one side clear and but little altered, the other 
side slightly stained yellow, and partially coated with 
a fllm of carbonate of lime. 
From Hoxne Fig. 6. Found in the brick-earth h, 1852 ; depth uncertain ; 
from the collection of Mr. Amyott ; surface but little 
altered ; more vitreous than in a freshly broken flint, 
Note . — On Plate XI,, beds No. 2, section 3, are represented too thick, whilst the line of base of the 
Boulder Clay (4) should be more irregular and higher. 
From St. Acheul, Amiens. 
2 u 
MDCCCLX. 
