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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 14, 



run, at short distances apart, thin layers of small pieces of flint and 

 ferruginous grit, termed "roach" by the workmen, and from the 

 lowest seams of which I have a fragment of bone (Horse), found by 

 one of the labourers in digging the brick-earth. 



Fig. 4. — Section of the Brick-earth at London Street. 



Length 80 feet; height 17 feet. 



a. Alluvium. d. Gault in situ. 



h. Brick earth. \ e. Lower Greensand in sitti. 



c. Angular flint drift. / 



The lower portion of this clay contains abundantly land- and fresh- 

 water-shells, namely : — - 



Helix concinna. Succinea oblonga. 



Pupa. 



At a distance of about 70 feet to the north of this pit, the Lower 

 Greensand is found (at the side of the road leading to Ford) only 

 4 feet from the surface, — showing the face of the greensand against 

 which the brick-earth there abuts to be very steep. 



I may add that I have the antler of a Deer from the New Reservoir 

 of the "Water-works at the Cherry Garden, N.N.W. of the Bayle (at 

 an elevation of 232 feet), the core of a horn of Bos urns from an ex- 

 cavation at the corner of Darlington Place, \ mile N. of the Town 

 Hall, near the Viaduct (elevation 138 feet), and that a large fragment 

 of a Cetacean bone is in the possession of William Bateman, jun., 

 Esq., of this town, who obtained it of one of the workmen employed 

 at Porter's Saw Mill (elevation 50 feet), see Plan, fig. 1, d ; but, not 

 having been present at any of these excavations, I cannot state the 

 mineral characters of the beds in which they were found ; in the last 

 two cases I believe them to be the ordinary brick-earth. 



I have digressed thus far from my proper subject, thinking the 

 above facts, with my discovery of the microscopic organisms of the 

 Chalk in the Bone-bed, Drift, and Brick-clay, would indicate some 

 relation between these three deposits, and serve to determine in some 

 measure the probable epoch of the formation of the Bed to which this 

 paper refers. 



