xlviii. Proceedings. 
was at first deposited, and was then left high and dry by the 
stream, was briefly sketched. It was also explained that this 
bed of gravel rested on sand, which had a very uneven surface, 
and seemed to be deposited over the outcrop of the Tertiary 
beds which lie immediately over the chalk; the sand on the 
south side of the pit being Thanet sand, and that on the north 
side part of the Woolwich and Reading series. NNomammalian 
remains have been found in the pit. 
The party next proceeded by the footpath to the grounds of 
Park Hill House, where the springs which supply the orna- 
mental water were examined and described. From Park Hill 
House the party proceeded across the fields to the Water 
Tower, which was’ascended, and from its summit the distant 
objects to be seen, and the chief physical features of the district, 
including the eastern and western water sheds of the Wandle 
basin, were pointed out and described. Attention was parti- 
cularly called to the direction and curved shape of the valley 
from Merstham, immediately to the south of Croydon, and this 
was contrasted with the direction taken by the valley of the 
Wandle to the north and north west of Croydon. 
The chalk pit in Coombe Lane, with its bed of Thanet sand, 
situated on the extreme southern edge of the London basin, 
having been examined, and described by Mr. Lobley, the party 
went on to Croham Hurst. Here the position and structure of 
this hill, as an outlier of the Oldhaven beds, was described by 
Mr. Lobley, and the various places and objects of interest to 
be seen from the summit of the hill were pointed out. 
The next place visited was the chalk pit in the Brighton- 
road, near Purley, well known to geologists as the pit in which 
was found the granite boulder, apparently of Scandinavian 
origin, and supposed to have been dropped into the ancient 
chalk sea, from a floating glacier, during the cretaceous period. 
The party then proceeded by Riddlesdown along the edge of 
the Caterham valley, excavated in the chalk, and well known 
as the valley in which, in wet seasons, the Bourne stream 
flows. The excavations along the hill side, and the fine chalk 
pit near the Rose and Crown having been examined and 
described, refreshments were obtained at the Rose and Crown 
Inn, and the party returned home, by train, from Kenley station. 
Ordinary Meeting, Sept. 15th, 1880. 
Joun Fiower, M.A., F.Z.S., President, in the Chair. 
The minutes of the last meeting were read and confirmed. 
Mr. Alfred Tylor, F.G.S., &c., Mr. Alfred William Rich, 
and Mr. Albert Bartrum, were balloted for, and elected. 
