204 Reports and Proceedings— 
lying greenish compact clay looks like Lower Barton, but may belong 
to the Middle. The Upper Bartons are much weathered and un- 
fossiliferous, but the Paludina-beds of the Lower Headon do not 
appear for 5900 yards east. Some of these, 2380 yards west of the 
Brockenhurst road, are violently contorted. 
The Alum-Bay section was then compared with those previously 
given, and the authors also noticed the Bracklesham, Stubbington, 
and Hunting-Bridge sections to show the transitional character of 
the highest of the Bracklesham beds. The paper concluded with an 
analysis of the fauna, and carefully revised and tabulated lists. 
Mr. Monckton, in his Appendix, stated that in the London basin 
the Barton beds are represented by the Upper Bagshot Sand, a mass 
of yellow or nearly white sand without clay-beds, though often 
loamy. Its greatest proved thickness is 2284 feet, and the base is 
marked by a very persistent bed of pebbles. 
Its extent is considerably greater than is shown on the Geological 
Survey map. 
Casts and impressions of shells are abundant in some places, but 
recognizable species have only been found at ‘Tunnel Hill near North 
Camp Station, Aldershot. A large collection from this place has 
been made by Mr. Herries and by the author. 
IJ.—April 11, 1888.—W. T. Blanford, LL.D., F.R.S., President, 
in the Chair.—The following communications were read :— 
1. “On the Lower Beds of the Upper Cretaceous Series in 
Lincolnshire and Yorkshire.” By W. Hill, Esq., F.G.S. 
The Red Chalk which forms the basement-bed of the Upper 
Cretaceous in Lincolnshire and Yorkshire is a continuation of the 
Hunstanton Limestone. Its thickness increases in South Lincoln- 
shire to thin away again in the north of that county; but it again 
increases north of the Humber for a while. Near its most north- 
westerly exposure on the Yorkshire Wolds the red colour is lost; 
but Inoceramus sulcatus and Belemnites minimus are found in a dirty 
yellow-coloured material of trifling thickness. Eastwards it regains 
its red colour and thickness, so as to be upwards of 30 feet at Speeton, 
where also it is less calcareous. This section was described in detail, 
and the results compared with those of other writers. The author 
speculated upon the probable limits of the Upper Cretaceous sea at 
this period on evidence mainly based upon the amount of matter 
of inorganic origin. He noted that Am. interruptus has been found at 
Witheall, Am. rostratus at South Cave, and Am.? auritus at Wharram 
Grange. 
The base of the Chalk Marl through Lincolnshire continues to 
be marked by a bed of compact limestone, which is the representative 
of the “sponge-bed” of Hunstanton. This can also be traced in 
Yorkshire as far as the north-western extremity of the Wolds. 
Above this a few feet of grey gritty chalk retain the character of 
the “ Inoceramus-bed” throughout the area above mentioned. At 
the north-western extremity of the Wolds the main mass of the 
Chalk Marl has diminished in thickness, but more than recovers 
