92 Reports and Proceedings— 
and the allied branches of science. Particulars will be immediately 
announced by the Committee. 
Fellows of the Society are invited to jom the Congress and to 
assist in making the Meeting a success. 
The following communications were read :— 
1. “On the Correlation of some of the Eocene Strata in the Ter- 
tiary Basins of England, Belgium, and the North of France.” By 
Prof. Joseph Prestwich, M.A., F.R.S., F.G.S. 
Although the relations of the several series have been for the most 
part established, there are still differences of opinion as to the exact 
relation of the Sable de Bracheux and of the Soissonnais to the 
English series; of the Oldhaven Beds to the Woolwich series ; and 
of the London Clay and Lower and Upper Bagshots to equivalent 
strata in the Paris basin. The author referred to the usual classifi- 
cation of the Eocene Series, and proceeded to deal with each group 
in ascending order. 
The Calcaire de Mons is not represented in England, but may be 
in France by the Strontianiferous marls of Meudon. It contains a 
rich molluscan fauna, including 800 species of Gasteropods, many of 
which are peculiar, but all the genera are Tertiary forms. ‘The 
Heersian are beds of local occurrence, and the author sees no good 
reason for separating them from the Lower Landenian or Thanet 
Sands. We gave reasons for excluding the Sands of Bracheux from 
this group. Out of 28 Pegwell-bay species, 10 are common to the 
Lower Landenian, and 5 to the Bracheux Sands, which present a 
marked analogy with the Woolwich Series. These Sands of Bracheux 
are replaced in the neighbourhood of Paris by red and mottled clays. 
Out of 45 species at Beauvais only 6 are common to the Thanet 
Sands and 10 to the Woolwich Series. Out of 75 species in the 
Woolwich and Reading Beds 19 occur in the Bracheux Beds, if we 
add to these latter the Sands of Chalons-sur-Vesles. 
Respecting the Basement Bed of the London Clay (Oldhaven Beds 
in part), the author would exclude the Sundridge and Charlton fossils, 
which should be placed on a level with the Upper Marine Beds of 
Woolwich. He allowed that the former were deposited on an eroded 
surface, but this involves no real unconformity, whilst the palzeonto- 
logical evidence is in favour of this view, since out of 57 species in 
the Sundridge and associated beds, only 16 are common to the London 
Clay. He therefore objected to the quadruple division. Hither the 
Oldhaven should go with the Woolwich or with the Basement Bed. 
He admitted that the term “Basement Bed” is objectionable, and 
preferred Mr. Whitaker’s term for the series, as he would limit it. 
The Lower Bagshot Sands.—The author would call ‘“ London 
Sands,” whose Belgian equivalent is the Upper Ypresian, and the 
French the Sands of Cuise-la-Motte, forming the uppermost series of 
the Lower Hocene. A group of fossils has been discovered in the 
Upper Ypresian sands of Belgium, which leaves no doubt of their 
being of Lower Kocene age, and consequently the Lower Bagshots 
must be placed upon the same horizon. There is no separating line 
of erosion between the London Clay and the Lower Bagshots, the 
