HAMSTEAD BEDS. 



205 



Less than a quarter of a mile north-east of Little Lynn 

 Common another well was sunk, at Dorehill. Unfortunately this 

 was finished and bricked before we heard of it. It showed blue 

 shelly clay, resting on red clay, water being obtained from a 

 running loam at 52 feet. The exact thickness of the different 

 strata, and the depth to the base of the Ccrithium beds could not 

 be learnt. However the fossils found in the spoil heap seem to 

 show that probably the base of the Gorbula beds is also preserved. 

 The species found were: — 



Carpolithes ovulum. 

 Seeds. 



Cytheridea Miilleri. 



Corbula pisum. 



vectensis. 



Cyrena semistriata. 



Cerithium elegans. 



plicatum. 



Hydrobia Chasteli. 

 Melania inflata. 

 Paludina (impressions). 



Nearly half a mile north-west of Dorehill, at Briddlesford 

 Lodge, another well shows the beds with Cerithium iilicatum 

 and Melania injiata. The details are : — 



Drift - Clayey gravel - . - - . 



Upper ["Yellow clay, much weathered . _ . 



Hamstead < Dark-blue shelly clay, full of Cerithium iilicatum 



Beds. L and Melania injiata . - _ . 



Lower r Green loamy clay - - - - . 



Hamstead < Green clay . . . - . 



Beds. L Green clay, with faint red mottling 



Feet. 

 4h 

 5 



1 

 1 



8* 

 3i 



23h 



This well stands in the middle of the farm buildings, and com - 

 mences at a height of 181 feet above the sea. Another well was 

 sunk at the south-east corner of the form at a height of 190 

 feet. It showed some curious bands ofbroken-up or reconstructed 

 clay. The section was as follows : — 



Lower (?) 



Hamstead 



Beds. 



f Mottled light-grey and dark-red clay 

 I Yellow and brown mixed clay — perhaps a recon- 

 I structed shaly clay - . . . 



I Greenish-blue clay . . . . 



Tenaceous blue clay . .. . . 



Sand parting - - . . . 



Reconstructed clay - - - . 



Mottled green and red clay, slightly carbonaceous 



Blue carbonaceous clay, full of Unio 



Though these wells lie only two chains apart, and apparently 

 o ught to penetrate the same beds, their sections are quite different. 

 No trace of the layers with Cerithium ■plicatum could be found in 

 the higher well, and the beds that were found are of such 

 exceptional character as to render it uncertain to what horizon they 



