412 Dr. Fitton on the Strata 



Dr. Fitton has kindly furnished the following communication : 

 and I cannot help supposing, that if a geologist of so much expe- 

 rience as M. Prevost is acknowledged to be, had enjoyed an 

 opportunity of studying throughout the relations of the Stonesfield 

 slate, he would hardly have entertained the theory which he has 

 suggested. 



Description of Plate XI. 



Fig. 1. The jaw in situ, of its natural size. The dimensions of the 

 slah, (which is reduced in the figure,) are 5^ inches by 5|. 

 Length of the jaw, 1 inch 4-lOths: breadth, 2-lOths; at the 

 coronoid process, 9-20ths. 

 Fig. 2. The jaw magnified twice in length.* 

 Fig. 3. The second molar tooth magnified six times. 



Art. XLIII. On the Strata from whence the Fossil des^ 

 cribed in the preceding Notice was obtained. By W. 

 H. Fitton, M.D., F.R.S,, Pres. G,S, 



[In a Letter addressed to W. J. Broderip, Esq.] 



10th December, 1827. 

 My dear Sir, 



My acquaintance with Stonesfield was derived from an 

 excursion made last spring, in company with Messrs. Oeynhausen 

 and Dechen of Berlin, two distinguished Prussian geologists, who 

 were at that time travelling in England ; and I now send at your 

 desire some account of the strata that have furnished your very 

 interesting specimen, — though my notes were not taken with any 

 view to publication, and probably require several corrections. 

 Our visit was too short to admit of detailed enquiry ; but we saw 

 quite enough to be convinced that the beds including the assem- 

 blage of fossil remains that has excited so much attention, are a 

 conformable portion of the general descending series of England ; 

 the true place of which cannot be far distant from that assigned 

 to them by Smith, Greenough, Conybeare, Buckland, and other 



* The teeth, as here represented, are too crowded. 



