GEOLOGICAL SOCIETY OF LONDON. 



121 



Tliis paper related to the displacement of a sub-soil, 

 consisting of a stratum of brown alluvial clay, four feet thick, 

 and a bed of gravel from ten to thirteen feet thick, resting 

 upon the London clay, and covered by vegetable soil, from 

 the construction of an embankment, fifty-four feet in height, 

 which had subsided to a considerable extent. The eifect 

 observed in the strata, was a contortion of the beds parallel to 

 the undulated outline of the surface. This paper contained an 

 elaborate account of the progress of the subsidence, and the 

 developement of the effects. 



3. — Notice on the occurrence of fossil plants, in the plastic 

 clay, at Bournemouth in Hants, by the Rev. P. B. Brodie, 



These beds of clay appear beneath the white and yellow 

 sands of the plastic clay, at the higher parts of the clilFs, to 

 the east of Bournemouth. Impressions of ferns appear in 

 a bed of white sand, near the middle of the chfF, and a layer 

 of sandy clay is full of small leaves. Somewhat further are 

 beds of sand, and sandy clay, abounding with beautiful 

 vegetable remains, so perfectly preserved that the epidermis 

 peels off, when the specimen is exposed, and which are 

 evidently of tropical origin. 



4. — On the mouths of Ammonites, and on other fossils 

 found in the Oxford clay, near Christian Malford, on the 

 line of the Great Western Railway, by Mr, C. Pearce, 



The section exhibited at the point, whence the speci- 

 mens were obtained is as follows : 



1. — Alluvial soil 2 feet. 



2. — Gravel 8 feet. 



3. — Beds of laminated clay, alternating 



with layers of sandy clay, composed 



of broken shells 6 feet. 



The fossils described, were procured from No. 3, and 



consisted of crustaceans, which probably inhabited the 



dead shells of the Ammonite, and to which he applies the 



generic name Ammoni-colox, and an allied genus, for which he 



proDoses the name of Belemnoteuthis, Mr. Pearce is of 



