352 



H. W. MONCKTOtf ON THE BAGSHOT 



preserved. They are apparently of nearly the same species as those 

 at Pirbright. 



At Tunnel Hill, on the Woking-Aldershot branch of the South- 

 western Eailway, the casts are well preserved, and impressions of 

 the exterior of the shells are often to be found. 



The section is as follows : — 



1. Darkish yellow sand, passing into ochre sand, with casts of shells. 



20 ft. 6 in. 



2. A line of bright yellow sand 8 in. 



3. White sand, with numerous casts, passing into white sand, with patches of 



yellow sand, irregular iron-sand layers and concretions, numerous casts 

 and impressions of shells, and a few flint pebbles 27 ft. 



4. Variously tinted sands, with very few casts of shells 39 ft. exposed. 



Fossils from the Upjper- Bagshot Sand, Tunnel-Hill Cutting, 

 Pirbright, Surrey. 



vc Rostellaria rimosa, Sow. 

 c Terebellum fusiforme, Lam. 



Cancel! aria (2 species). 



Ancillaria canalifera, Lam. 



Voluta, sp. (rare here, but very 

 common at Crawley Hill). 



Volvaria acutiuscula, Sow. 

 c Natica ambulacrum, Sow. 



sp., perhaps N. conoidea, 



Sow. 



c ■ labellata?, Lam. 



O patula, Lam. 



Sigaretus canaliculars, Sow. 



Ceritbium sp. ? 

 vc Turritella imbricataria, Lam. 



Turritella, or Niso, sp. ? 

 c Litrorina sulcata, Bilk. 



Solarium bistriatum ?, Sow. 



plicatum ?, Lam. 



Phorus (2 species). 



Deritalium striatum, Sow. 



(small, smooth species). 



Actsson sp. 



Bulla attenuata, Sow. 



sp. 



vc Ostrea flabellulum, Lam. 



vc Pecten reconditus, Sol. 



Avicida media, Sow. ? 



Pectunculus sp. 



Nucula similis, Sow. 

 vc Cardita sulcata, Sol. (variety with 



tuberculate ribs). 

 c Crae satella sulcata ?, Sol. 

 vc Lucina mitis, Sow. 



c divaricata, Linn. (Bigaulti- 



ana, Desk.). 



Diplodonta sp. ? 



Cardium porulosura, Brand. 

 c Protocardium parile, Desk. 

 - ■ turgidum ?, Sol. 



Cytherea. apparently 4 species, 

 vc Tellina scalaroides, Lam. 



Corbula gallica?, Lam. 

 c Corbula flcus ?, Brand. 

 c pisum, Sow. 



striata ?, Lam. 



Clavagella coronata, Desk. 



Serpida extensa, Brand. 



? sp. 



Serpulorbis Marshii. 



Two or more species of corals. 



Wood. 



Correlation of the Bagshot Beds with the Hampshire Series. 



A glance at the table of strata (p. 348) will show that there are two 

 beds in which the occurrence of well-preserved fossils gives an 

 opportunity for comparison between the Bagshot and Hampshire 

 series. The first of these is the green-sand bed, E ; and the second 

 the higher beds of the Upper Bagshot Sands, marked A in the table. 

 Now, there can, I think, be little doubt that the green sand, E, must 

 be correlated with some part of the Middle Bracklesham of the 

 Hampshire basin ; and its great resemblance to the bed numbered 



