250 LUPTON : GOLD, SLATE, AND SALT MINES IN GREAT BRITAIN. 
MINERAL PRODUCE OF THE UNITED KINGDOM, l^^l . — Continued. 
Weight 
Value 
Tons. 
£ 
Iron Pyrites 
22,079 
12,682 
Jet 
JbB. 1,448 
289 
Lead Ore 
51,563 
429,137 
Lignite 
1,764 
793 
Manganese Ore 
13,777 
11,110 
Ochre, Umber, &c. ... 
8,293 
15,789 
on, Shale 
1,411,378 
855,085 
Petroleum 
66 
99 
Phosphate of Lime ... 
9,894 
15,830 
feaic lot', uuu tons or hock oait^ 
^,iyo vol 
'TOO QOA 
Slates and Slabs 
464,334 
1,118,818 
OuOIlt;, 0^(j. .. ... ••• 
IX 000 000* 
ft fiOQ ROO 
Sulphur of Strontia ... ... , ... 
15,169 
7,584 
Tin Ore 
14,189 
878,831 
Tungstate of Soda 
1 
24 
Wolfram 
54 
1.269 
Zinc Ore 
25,445 
76,182 
Total value 
206,043,905 
55,326,164 
* Tonnage estimated by author. 
FURTHER NOTES ON THE POLYZOA OF THE LOWER GREENSAND, AND 
THE UPPER GREENSAND OF CAMBRIDGE. PART ll."^' 
BY GEORGE ROBERT VINE. 
At the time when I wrote the paper on the Polyzoa and Foram- 
nifera of the Cambridge Greensand, very little information could be 
gleaned respecting Polyzoa from the horizons of the Gault, Chalk 
Marl, or Hunstanton Red Chalk, whilst from the horizon of the Cam- 
bridge Greensand no record of a Polyzoan fauna existed. Even as it 
is, much of our knowledge of the Cambridge Greensand Polyzoa is 
derived from the study of forms found attached to foreign bodies, or 
unattached (free) in the phosphate beds of Cambridge. As already 
stated in the first paper (p. 3), the fossils sent to me for examination 
and description, were the property of Mr. Thomas Jesson, F.G.S., so 
in the present case the additions to the fauna of the Cambridge 
horizons that I am now able to make, I owe to the same gentleman's 
careful scrutiny of his larger fossils, on which Polyzoan encrustations 
were found. In addition to these valuable collections, my own 
* Part i., Proc. Yorksh. Geol. Soc, Vol. ix., p.p. 1-16, 2 plates. 
