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I. 
TEL LIN A BALTHICA AND THE NORWICH CRAG. 
By F. W. Harmer, F.G.S. 
Read 26 th June, 1877. 
In 1865, in his ‘Remarks in explanation of the Map of the 
Upper Tcrtiaries of tho Eastern Counties,’ which were not 
published, but printed and distributed privately, Mr. Searles V. 
Wood, jun. disputed the identity of the so-called crag at Wey- 
bourno, on tho North Norfolk coast, with the iluvio-marine crag 
of Bramerton (which identity had been up to that time generally 
assumed), principally on the ground that the former deposit con- 
tained very abundantly a shell, Tellina baltliica (sol idula), the 
occurrence of which in the latter had never been authenticated. 
Sinco then, further investigation has shown the existence of a 
number of exposures, in what Mr. Wood and I have called the 
Bure Valley Beds, or Lower Glacial Pebbly Sands, at Belaugh, 
Crostwick, and elsewhere, between Norwich and Weyboume, of a 
fossiliferous horizon, containing a similar group of shells to that 
of the Weybourno deposit, Tellina baltliica always being the most 
abundant species. These beds- we associate, on stratigrapliical as 
well as on palaeontological grounds, with the glacial series, 
maintaining their separation everywhere from the crag deposits. 
These Bure Valley Beds have subsequently been described by Mr. 
Prestwich, and called by that gentleman the Westleton Shingle, 
though some doubt has been raised by the officers of H. M. 
Geological Survey, whether what Mr. Wood and I regard as the 
Bure Valley Beds do actually occur at Westleton. These pebbly 
sands underly and are interbedded with the Cromer till along the 
North Norfolk coast, and we have not been able to observe any 
unconformity between tho two deposits. 
In tho late Dr. S. P. Woodward’s list of the shells of the 
Norwich crag, Tellina baltliica is given under its synonym csolidula, 
