126 



These three species of Sealaria, were found in a dis- 

 tinct bed of Crag at Ramsholt hy the Rev, G. R. 

 Leathes ; the S. foliacea, was also found at Woodhall 

 in Suffolk, by the same Gentleman. The great resem- 

 blance they bear to recent species is remarkable, but is a 

 charaf'tes' possessed by many of the Fossils found in the 

 Crag ; many also agree with those found in the London 

 Clay, amongst tljem is So. semicostata,* (M. C tab. 16) 

 fragments of which have been met with, accompanying 

 the shells before us. 



* Probably Sc. decusstata of Lamarck. 



