172 



W. K. ITerries — On the Bagshot Beds. 



into an Upper Sandy series, a Middle Clayey series, and a Lower 

 Sandy series. The Middle series he grouped with the Bracldesham 

 of the Hampshire basin. The Upper he placed between the Brackle- 

 shani and Barton ; our present object is to show that it is more 

 nearly related to the latter. 



Upper Bagshot. — This is best exposed in the Foxhills and in 

 Frimley ridges. The series consists entirely of white and yellow 

 sands, with no pebble-beds, by which it is distinguished from the 

 Lower Bagshot sands. Professor Prestwich has recorded a few 

 casts of shells and other obscure remains, chiefly from the cutting 

 through the ridge on the South Western main-line near Frimley 

 Green. I have been so fortunate as to discover a better locality, 

 and have been able to add considerably to his list. This place is 

 the cutting on each side of the tunnel through the ridge in the 

 new Line from Brookwood through North Camp and Aldershot to 

 Farnham. This cutting, which is not marked on the Ordnance 

 Maps, lies between the words " Pirbright Common " and " Mitchet 

 Lake." The section shows nothing remarkable, and is entirely in 

 the Upper Bagshot. It consists of loose yellow sands, with one 

 or two whiter and rather harder bands, capped by drift gravel. 

 The fossils occur either loose in the sand, or imbedded in small 

 irony concretions, which lie scattered all through the bed. From 

 this cutting, and from the refuse heaps on the side, I have been able 

 to secure a fair collection of fossils, though nearly all unfortunately 

 are in the state of irony casts. This renders specific identification 

 difficult, but Mr. Tawney and Mr. H, Keeping, of the Woodwardian 

 Museum, Cambridge, have kindly identified for me the following. 

 The abundance or paucity of their occurrence is indicated by letters, 

 while it is indicated within brackets whether the form occurs at 

 Barton or Bracklesham, or both. 



Ostrea, sp^ 



Feeten triginta-radiatus ? ? (Bk. 

 only). 



c.' carinatus ? (Barton). 



c. Cardita sulcata ? (Barton). 

 Nucula similis. 

 ( Corbula Jicus ? (Barton only). 



\ pistcm (both). 



striata (both). 



C. Tellina scalaroides (Brook only ?). 



sp. 



Cj Grassatella sulcata ? (Barton only). 

 Ci Cytherea, more than one species. 

 Cardiiim turgidum ? 



sp. 



Frotocnrdium^ sp. 

 Lucina mitis (both). 



Eigaultiatia (Barton only). 



1*. Glavagella coronal a (Barton only). 

 Many casts of bivalves indetermin- 

 able. 

 r. Serpulorbis Marshii (both). 

 Ostrea Jlabellula (both). Wood. 



A consideration of the above list tends to show a position rather 



v.c. Bentaliwn, sp. (like 



described Brook species). 

 c. Solarium bistriaium ? (L. Eocene). 



canaliculutum ? 



c. Phorus, two species. 

 Littorina, sp. 

 iNatica labellata ? (both). 



V.C. I ambulacrum (both). 



( patula (both). 



sp. like N. conoides (Bk. 



only), 

 v.c. Turritella imbricataria (both). 



sp. or Kiso ? 



C. Rostellaria rimosa (both). 



Fusus, sp., perhaps young of F. 



longcevus (both). 

 Valuta, sp. 

 Cancellnria, sp. 

 c. Terebellum, sp. 



r. Volvaria acutiuscula (Barton only). 

 Bulla attenuata (both), 

 sp. 



