then, of actual survey, it appears that the boundary line of this clay com- 

 mences north of Holly Grove, and crossinc^ the railway parallel with the 

 turnpike road, possibly takes in Stape Hill, crosses the Stour to Oakley, 

 where the railway is a^ain cut through it. 



Returning to HighclifF, we have the cliff from thence to Mudieford com- 

 posed entirely of sand. From Hengistbury Head an ironstone lias been 

 dug for several years past, and shipped to Swansea : it produces 2') per 

 cent, of iron. From the blocks on the shore may be obtained teeth of 

 Lamna Elecjans. Between this point and Bournmouth the cliff is composed 

 of sands and sandy clay. 



At Bounimouth, is a band of a light-coloured sandy clay about 

 three feet in thickness, which contains leaves of several species, and one 

 or more species of fern. In sinking a well near the Preventive Station, 

 the workmen came upon the same vein. Specimens are most easily 

 obtained at a small ravine formed by the falling of a landspring, situated 

 about a quarter of a mile west from Bourne. Thence to the Sandbanks 

 the cliff presents the same character, being composed of sands and clays. 

 About midway there was formerly a pottery for the manufacture of 

 common earthenware. From the ending of this cliff to Studland, are 

 about three miles of sand hills. On the left of the road which leads 

 from the shore to the village of Studland, the cliff is composed of a dark- 

 coloured clay, which is succeeded by variegated sands similar to those 

 at Alum Bay. In this cliff is a vein containing leaves. These occur 

 also at Arne in Poole harbour, and abundantly at a pipe-clay pit at 

 Furzey Brook, where is exposed the following section in descending 

 order : — 



Bed of Lignite, about 10 feet. 



Grey Clay, with leaves carbonised 2 ,, 



Yellow sandy Clay with leaves 2 „ 



Irony Band, a few inches. 



White Sand, about 30 „ 



Pipe Clay 11 to 14 „ 



I have obtained many species of leaves from this pit, and qne very 

 fine specimen of a reed. 



The only other organic remains which this district affords are several 

 species of shells, amongst them a Cardium, which occurs abundantly in 

 a sandstone at a pit near Lytchet Beacon. 



The variegated sands at Studland are separated from the chalk by a 

 low cliff, which is covered with brushwood. The plastic clay, con- 

 sequently, is not exposed to view. 



I do not attempt to enter upon the still disputed question of the 

 divisions of the sand and clays, which occupy the above-noticed dis- 

 trict, viz., from High Cliff to Studland; but merely add Mr. Prestwich's 

 series published in the Quarterly Journal of the Geological Society, for 

 November, 1847: — 



Fluvio- Marine, and freshwater series. 

 Barton Clays. 



Bagshot, or Bracklesham Sands. 

 :' London Clay. 



Mottled Clays and Sands. 



At the commencement of the chalk cliff are four domes, formed of a 

 conglomerate composed chitfly of iiints ccniented together by irony matter, 

 and which are filled with chaik. The cliff here has been disturbed, the 



