354 Remarks on the Crag Formation of Norfolk and Sitffblk, 



transported, being waterworn and fragmented ; this was my 

 impression at the time I visited it, and I see no reason to 

 alter my opinion now ; neither do I wish to underrate the 

 merits of Mr. Charles worth's valuable communication, but 

 speak my sentiments in order that truth may be elicited. The 

 undisturbed bed has a layer of corals of the genus Astrea, to 

 which the Ostrea spectrum (Leathes) and Balanus sagittata are 

 frequently attached; the latter is provisionally named sagittata 

 by my friend the Rev. G. R. Leathes, from the shape of the 

 accessory valves, which are frequently found in situ. This 

 layer of corals is about three feet below the line of junction 

 with the disturbed crag, and in about the same line I found 

 the tooth of a shark two inches in length, of a light blue co- 

 lour; and was subsequently presented with two others of the 

 same kind, but smaller, by the gentleman who conducted me 

 to the spot*. 



It will be inferred from what I have above stated, that I con- 

 sider the two bedsatRamsholt to be of the same age; and that 

 the red crag, by diluvial agency, has been superimposed upon 

 the undisturbed bed. There is, however, a bed of crag in Suf- 

 folk quite distinct from those at Ramsholt. I allude to that ex- 

 posed on Thorpe Common, about three miles north of Aid- 

 borough ; it contains shells specifically like those found in the 

 Norfolk beds, with the vertebrae and tubercles of the thorn- 

 back and other bones, common in the pits at Thorpe by Nor- 

 wich. My impression is that the Norfolk crag, extending as 

 far south as Thorpe by Aldborough, is a newer deposit, and 

 that could it be sunk through at the latter place, the regular 

 Suffolk crag shells would be found. One fact in favour of its 

 more recent origin is, that a few of the characteristic shells of 

 the Suffolk crag have been found in it near Norwich, as Murex 

 contrarius, Pectunculus variabilis, &c, in a bouldered state. 



My view of the tertiary deposits of the eastern coast of En- 

 gland is, that in the antediluvian period this island formed a 

 part of the continent, and that the London clay deposit con- 

 tains the exuviae of an inland sea which communicated with 



*The gentleman here alluded to is Mr.W. S. Fitch of Ipswich, who does 

 honour to science by his zeal in collecting for the pleasure of enriching the 

 cabinets of others. That gentleman presented me with a bouldered tooth of 

 the shark, black and shining, which measures three inches across its base ! 

 1 think from its worn state that this must equal any of the Maltese teeth. 

 I cannot close this note without bestowing the meed of praise on my friend 

 S. V. Wood, Esq., of Hasketon, near Woodbridge, whose collection has 

 been so highly and deservedly spoken of by Mr. Charlesworth, for the li- 

 berality with which he distributes his treasures. 



