T1IK KOCENE SKKIKS 



533 



Gastropoda. Turritella imbricataria, Rostellaria (Hipjtochrenes) ampla, 

 Rimellii rimosa, Conorbis dormitor, Murex asper, Typhis 

 pungens, Fusus porrectus, Clavella longaeva, Buccino- 

 fusus regularis, Pleurotoma (Surcula) rostrata, Cassi- 

 daria nodosa, Xenophoraagglutinana, Olivella Branderi, 

 Vohita athleta, V. luctatrix. 



B. BRITISH EOCENE DEPOSITS 



The present restricted extent of the Eocene deposits in England 

 ami tlicir separation into two basins are due to the upheaval and 



Fig. 180. FOSSILS oy THE BRACKI.ESHAM AND BARTON BEDS. 



a. Valuta athlete. 



'-. Conus deperditus. 



. Xi'iiophora agglutii.an^. 



d. Olivella Branderi. 

 f. Ancilla buccinoides. 

 /. Cardita planicoHta. 



disturbance which took place in Miocene time, when lateral 

 pressure from the south established a series of east and west flexures ; 

 and as the Palaeogene deposits have been removed from the anti- 

 diuals, the parts which remain occupy two synclinal areas, t.. 

 the London and the Hampshire basins. 



A glance at any geological map will show the extent of the 

 Palaeogene Beds in these two areas. The London basin extends 

 from Hungerford in Berkshire to Reculvers in Kent, and its 

 northern boundary passes from Reading through the counties of 



