10 
of clay in the direction of the principal horizontal vein, the carbonate 
of zinc was found on the negative side, or towards the copper plate; 
and the carbonate of copper nearest the zinc plate: and as the for- 
mer must have been derived from the zinc plate, it is curious to ob- 
serve such a complete transposition of the respective metals. 
Mr. Fox is of opinion that these results have a strong bearing on 
the numerous mineral veins and beds which are found conformable 
to the direction of the lamine of the containing rocks, as well as on 
those veins which traverse the lamine of the conformable veins. 
An extract was afterwards read from a letter addressed by Captain 
Alexander to the Secretary, explanatory of casts of portions of 
Mastodon teeth from the crag, and on the occurrence of a particu- 
lar bed containing Echini in the coralline crag at Sudbourne. 
The larger cast was taken from a Mastodon tooth found on the 
shore at Sizewell Gap, about seven miles from Southwold. When 
the original came into Captain Alexander’s possession, crag adhered 
to it in considerable quantity; and he has no doubt that it had been 
washed from Easton, about 14 mile north of Southwold. The weight 
of the tooth is 2lbs. 54 0z., its length is about 6 inches, and its 
breadth 34 inches; and although it had been washed eight miles, 
only three of the crowns had been injured. ‘The other cast is from a 
fragment of a young tooth found by the author in the crag at Bra- 
merton. 
Capt. Alexander found also the canine tooth of a large carnivo- 
rous animal in the crag at Easton. At Bramerton he obtained also 
five crabs, three of which were almost perfect. At Sudbourne, near 
Orford, in a bed of very fine coralline crag, he found several beau- 
tiful Echini; and in a thin, argillaceous layer in the centre of the 
same bed, the greater part of the vertebral column of a fish, the re- 
mains of crabs, and the ear bone of a whale, which had apparently 
been water-worn before it was enclosed in the crag. To this stratum 
Captain Alexander calls particular attention, as he believes it would 
be found to be rich in organic remains, if it were properly examined. 
December 5th.—William Long, Esq., of Hart’s Hall, Saxmund- 
ham; George Lloyd, Esq., M.D., Newbold Terrace, Leamington; 
Edward Wilson, Esq., of Abbot Hall, Kendal; Edward Strutt, Esq., 
M.P., of St. Helen’s, Derby, and South-street, Grosvenor-square ; 
Mr. Thomas Evans Blackwell, Hungerford, Wiltshire; John M. 
Herbert, Esq., Fellow of St. John’s College, Cambridge ; and Charles 
Collier, Esq., F.R.S., Deputy Inspector-General of Hospitals, Earl’s 
Terrace, Kensington; were elected Fellows of this Society. 
A paper was first read, entitled ‘“‘ A few brief Remarks on the 
Trap Rocks of Fife,” by the Rev. John Fleming, D.D., and commu- 
nicated by Charles Lyell, Esq., V.P.G.S. 
The trap rocks of Fifeshire are referred by Dr. Fleming to three 
distinct epochs of volcanic action; and he says that the products of 
