﻿BIVALVIA. 



101 



one from the Lower Glacial sand of Belaugh, and a fragment from the Middle Glacial 

 sand of Hopton, and these are all the instances that have occurred to my knowledge. It is 

 by no means uncommon in the Cor. Crag, where specimens have a diameter of two 

 inches. 



Anomia patelliformis, Linne'. Crag Moll., vol. ii, p. 10, Tab. I, fig. 4. 



Localities. Cor. Crag passim. Red Crag passim. Fluvio-marine Crag, Bramerton. 

 Chillesford bed, Sudbourn Church Walks, Aldeby and Bramerton. 



This species has been sent to me by Mr. Reeve from both beds at Bramerton, and 

 by Messrs. Crowfoot and Dowson from Aldeby. Mr. Bell ( { Ann. and Mag. Nat. Hist.,' 

 1870) gives it from Sudbourn. In the other localities I have obtained it myself. 



At p. 323, Appendix to ' Crag. Moll.,' Tab. XXXI, fig. 24, a Cor. Crag fossil was 

 figured erroneously under the name of Aplysia ? This I have since found to be the more 

 solid portion of the lower or adherent valve of some species of Anomia, probably A. 

 ephippium. 



Ostrea edulis, Linne. Crag. Moll., vol. ii, p. 13, Tab. II, fig. 1. 



Localities. Cor. Crag passim. Red Crag passim. Fluvio-marine Crag, Bramerton 

 and Thorpe. Post Glacial, March, Kelsea Hill, Hunstanton, and Nar Valley. 



In ' Quart. Journ. Geol. Soc./ vol. xxvi, p. 94, a list of shells from the Middle Glacial 

 sands is given on my authority, and in it this species is given from Stevenage, in Herts. 

 Since then I have doubted whether the specimens upon the strength of which the name 

 was inserted may not be those of Gryphcea dilatata, and I have therefore omitted the 

 species as a Middle Glacial shell. So far as the testaceous remains are a guide, I cannot 

 in many instances distinguish between the forms of the secondary Gryphaa and those 

 of the recent Ostrea. The species 0. edulis is given in Dr. Woodward's list (in ' White's 

 Directory ') as occurring at Bramerton and Thorpe, but I have not seen it from thence, nor 

 from any of the localities of the Chillesford bed. It is very profuse in the Post Glacial 

 gravels of March, Kelsea Hill, and Hunstanton, as well as (according to Mr. Rose) in all 

 the Nar Brickearth localities. 



Ostrea cochlear, Poli. Crag Moll. vol. ii, p. 14, Tab. II, fig. \c, as 0. edulis, var. 



spectrum. 



Mr. Jeffreys, in his list accompanying Mr. Prestvvich's Cor. Crag paper, and also Mr. 



