134 Notices and Extracts from the Minutes of the Geological Society. 



takes place in every direction ; in others, the beds are nearly horizontal, and 

 are worked over a considerable area without descending deeper." 



Mr. Lyell remarks in the same letter, "that upon examining the collection 

 of the Geological Society, he has found, among the specimens from Battle, one 

 which agrees with the calciferous sandstone of Tilgate Forest, and contains 

 carbonized wood : and that among a series of specimens from the cliffs at 

 Hastings, collected by Mr. Webster, which still more closely correspond with 

 those of Tilgate Forest, there are the teeth of fishes and amphibia, and the 

 rib of an animal, inclosed in the rock." 



From the preceding observations we may, I think, fairly conclude, that the 

 calciferous sandstone of Rye, Winchelsea, Hastings, Tilgate Forest, and 

 Horsham, are but different portions of the same series of deposits, belonging 

 to the iron-sand formation ; the Ashburnham beds being situated beneath 

 them. 



The organic remains which I have now the honour to present to the 

 Society, may be considered as characteristic of the strata of Tilgate Forest. 

 They are as follow : 



Stems of vegetables allied to the genus Cycas*, and, perhaps, Euphor- 



bium. 

 Leaves of a species of fern 

 Plates and bones of turtles. 

 Teeth and bones of crocodiles and other saurian animals, of an enormous 



magnitude. 

 Bones of birds. 

 Teeth and scales of fishes. 

 Teeth of an unknown herbivorous reptile, differing from any hitherto 



discovered either in a recent or fossil state. 

 Teeth of an animal of the lacertian tribe, resembling those found at 



Stonesfield near Oxford, and figured by Lhwyd. 



I have the honour to be. 



Sir, &c. 

 Castle Place, Lewes, June 1, 1822. GiDEON Mantell. 



* Some of these closely resemble the stem of Cycas revoluta. Of this plant, a fine recent spe- 

 cimen may be seen in the magnificent collection of palms of Messrs. Loddiges at Hackney. 



