003 
the Amber insects of Norfolk with those of Prussia, till the latter 
are properly described. 
1 hough the fossils do not yield sufficient evidence on which to 
correlate the deposits on opposite sides of the Xorth Sea, yet, taken 
Nvith the geological structure of Norfolk, they point to the original 
continuity of the bed from Prussia to within a short distance of the 
English coast. The known eastward dip of the strata in Norfolk, 
and the thickness of the London (.day at Yarmouth, ought to bring 
on Upper Eocene and Oligocene beds within a short distance of the 
coast. Thus the Amber-bearing deposit may have to be added to 
the list of formations represented in England, if its occurrence 
within the three-mile limit of tlio territorial waters could bo 
proved. 
llio (quality of the Norfolk Amber — it I may judge by what has 
passed through my own hands — is very good, but apparently there 
is a larger proportion of dark transparent lumps, and less clouded 
and light yellow than is found in Prussia. Mr. A. S. Foord has 
kindly cut and examined a microscopic section of clouded Amber 
for me, and finds that the opacity is duo to minute air-bubbles. 
The size varies much, most of the pieces being small and broken. 
Jkfr. Savin has a mass weighing eleven and a half ounces, ami 
it is said that a piece in the possession of Mr. Barker is much 
larger. The majority of the collections were made in Sutfolk, 
Avhore Amber is perhaps still more abundant, but the character is 
the same. Further north Amber is also found on the Lincoln- 
shire and Yorkshire coasts ; but, from the difficulty of obtaining 
authentic specimens, it has been thought advisable to confine tho.se 
notes to Norfolk. 
It is possible that some of the worked Amber found in Emdish 
tumuli may have been made out of native material ; but it seems 
more probable that it was imported, for the manufacture woidd 
only be understood in a district where the raw material was com- 
paratively plentiful. Tliough the present annual yield is more than 
sufficient to caccount for all the ancient Amber ornaments yet found 
in England, — if wo may consider it a fair criterion of the former 
supply, — yet it must bo remembered that, were it not for the 
constant gathei’ing of sea-weed for manure, nearly all the pieces 
would be overlooked, and destroyed by the waves. 
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