LOWER CHALK -BERKSHIRE. 
167 
A similar set of beds was exposed in the excavation for the Wan 
tage Waterworks, half a mile south of the town, and from them 
many fossils were obtained by Mr. E. C. Davey, then a resident in 
Wantage (about 1878). Some of these were sent for my inspection, 
and among them I recognised the species above mentioned, together 
with Avellana cassis, Solarium sp. Pecten asper, and Terebratulina 
triangularis. His collection from the same horizon also included 
Turrilites tuherculatus, Terebratula biplicata, Discoidea subuculus , 
and other undetermined species. 
Another good exposure of these beds will be found in the lane 
leading northward from Lockinge to the main road from Wantage, 
which here passes over a small outlier of Chalk Marl. This lane 
traverses the following beds : — 
ft. 
Hard grey bedded chalk, with many Am. [SchL] varians- 5 
Soft grey argillaceous marl ------ 6 
c> Hard grey chalky marl— Turrilites Bergeri - - - 1 
Hard glauconitic marl, with large nodular lumps of harder 
stone, enclosing Aw. [Schli\ varians, Strephinia con- 
voluta, and Pleurotomaria - 3 
2. Sandy glauconitic marl with scattered phosphatic nodules, 
without a definite base - - - - - - -2^ 
1. Green glauconitic sand (Selbornian). 
In this section No. 2 probably represents the Chloritic Marl or 
subzone of Stauronema Oarteri, but I did not find any recognisable 
fossils in it. The overlying bed appears to correspond with that 
which overlies the Chloritic Maid in the Isle of Wight, and has been 
called the “ niveau a Plocoscyphia mcmndrina ” by Professor Barrois. 
Chalk with Ammonites varians.— The lowest beds of this 
zone are exposed in the road-cutting half a mile south-west of 
Kingston Lisle, the section seen in the bank being : — 
ft. 
Hard rocky marl -------- about 3 
Soft grey marl 8 
Hard glauconitic marl, seen for - - - - - ,, 2 
South of this and about 70 feet higher is a small quarry showing 
marly chalk, rather hard and blocky, with some softer layers, over- 
lying a bed of very hard grey stony chalk containing Am. [ Schl. ] 
varians, Turrilites scheuclizerianus, Inoceramus latus, &c. Of 
this feet were seen, the rest being concealed by fallen debris. 
Beds near the base of the Chalk are exposed in the cutting on 
the main road south of Sparsholt; they consist of tough, marly 
chalk, greyish-brown where damp, but drying to a light grey. I 
found here Inoceramus latus, Lima globosa, and Rhynchonella 
Martini. 
Between Letcombe Kegis and Letcombe Basset beds of greyish- 
white blocky chalk can be seen at intervals along the watercourse, 
especially near the latter village, where fine springs issue from beds 
