378 
as having been found at Postwick, a locality which is by every one 
recognized as of true crag age. 
The attention called to this matter has induced a most diligent 
search in the crag beds, by local collectors, for this shell, but such 
search has met with no success. I have always believed that it 
had been erroneously placed in Ur. Woodward’s list, although 
Mr. Prestwich in the list of Mollusca which accompanies his paper 
on the crag (Q. J. G. S. vol. xxvii, p. 485) includes it, on this 
authority, among crag species, giving it however with a 1 as from 
Postwick. 
Dr. Woodward gives in most cases his authority for the occur- 
rence of the different shells he names in his catalogue, but he does 
not do so in the instance we are discussing. One of the authorities, 
however, that he follows is the list given by Mr. Lyell (Sir Chas. 
Lyell), in the year 1839, and published in the ‘Magazine 
of Natural History’ (series ii, vol. iii, p. 3 13). Happening acci- 
dentally to refer to this paper, I found that the locality given in it 
for Tellina baltliica is Croat wick. Dr. Woodward says nothing 
about Crostwick, which he should do seeing he quotes from the list 
in which this locality is given, but he gives instead Postwick. It 
seemed therefore to me likely, that one of these very similar names 
had been accidentally substituted for the other, and I mentioned 
the matter to Mr. H. 13. Woodward of H. M. Geological Survey, 
the son of Dr. Woodward. That gentleman kindly undertook a 
search among his father’s papers, and very fortunately found the 
original manuscript of the list, in Dr. Woodward’s handwriting, 
and in it the locality for Tellina baltliica stands Crostwick only ! 
I may now congratulate the geologists of East Anglia, I think, 
that this matter, about which so much valuable time has been 
wasted, can at length be so satisfactorily cleared up. I am the 
more glad that it can be, as on my last visit to the British 
Museum, I found among the Norwich crag shells, a tray full of 
specimens of Tellina baltliica, which had evidently been obtained 
from some glacial bed, but which were labelled “ Norwich Crag, 
Post wick.” 
Another similar error likely to find its way into print, and so 
cause the insertion of this species in crag lists, has arisen from the 
fact, that Mr. A. Bell found, among a set of shells sent him by 
Mr. Crowfoot, of Becclcs, from the Chillosford beds at Aldeby, 
