W. H. Herries — On the Bagshot Beds. 173 



above the Bracklesham, and seems to assign to the Upper Bagshot 

 of the London basin a position ahnost equivalent to the Barton of the 

 Hampshire basin. It would also indicate that that part at least of the 

 Hampshire basin Upper Bagshot which, at its summit immediately 

 under the freshwater Lower Headon at Hordwell, contains Oliva 

 Branderi and C. (Vicarya) concavum, is a distinct and probably higher 

 horizon. There are many exposures of the Upper Bagshot in the 

 ridges, but at only three others have I found fossils, and these fossils 

 are not to be compared in state of preservation with those in the 

 Tunnel Hill cuttings. These places are the old cutting on the main 

 line where Prof. Prestwich found his specimens {loc. cit. p. 393) ; 

 a new cutting at Crawley Hill in the new railway from Frimley to 

 Ascot, and a road cutting on the side of the hill near Heatherside 

 nursery gardens. It is remarkable that the fossils should be so com- 

 paratively well preserved only in one place, while in the others they 

 are usually friable pseudomorphs of iron sand, often hollow, and only 

 having the general shape of the fossils they represent, no markings 

 being preserved. 



Middle Bagshot. — On good fossil evidence this was referred by 

 Prof. Prestwich to the Bracklesham, and sections were given b}'^ him 

 in the paper referred to above of the chief fossil localities, viz. Golds- 

 worthy Hill and Chobham Place. Strange to say, at the former of 

 these places I have not been successful in finding any fossils, though 

 I have carefully searched as much of the cutting as is still exposed, 

 it being now much overgrown. A fine section is, however, now open 

 in the new line between Frimley and Ascot, about a mile from Ascot 

 station. 



The beds shown are in descending order. 



Upper Bagshot ? 1. Yellow sands feet inches. 



f Iron band 1 



I Yellow sands 2 6 



I Pebble-bed often in a greenish matrix 10 



Middle Bagshot -| Yellow, white, red, laminated sandy clays .... 10 about 



I Pebble-bed 2 



I Yellow and liyer-coloured laminated sands .... 3 



i. Green sand, fossiliferous yellow sand 12 about 



Lower Bagshot Yellow sand. 



In the Gi'eensand bed fossils occur in a particular band. The 

 following have been found here : — 



Phorus, sp. 



c. 



Pecten corneus. 



Natica, sp. 



v.c. 



Gorbula gallica. 



Fusus longcevus. 

 Turritella, sp. 



v.c. 



Oardita planicosta. 

 — acuticosta. 



Valuta, sp. 

 Oslrea Jiahellula. 



c. 



Cytherea obliqua ? 

 Cardium semigranulatum 



sp. 





— porulosum. 



The fossils are invariably casts and often curiously distorted. In 

 this section the pebble-beds are very thin, but towards the east they 

 swell out. In a shallow road cutting near the Queen's Clump, about 

 half a mile west of Long Cross, the fossiliferous green sand again 

 appears, and is there capped by about six feet of pebbles. Near 

 Ottershaw the pebble-beds must be ten feet or more, and are always 



