368 CRETACEOUS. 



with the beds above, may be seen at very low tides at the base of 

 Shorncliffe (see Fig. 60). The Atherfield Clay has also been 

 recognized near Maidstone, Sevenoaks, Redhill, and Guildford. It 

 has not been determined in the eastern part of Sussex, but it has 

 been observed at Petersfield and Pulborough. 



The beds display the incoming of marine conditions, for they 

 contain PanopCEa, Exogyra sinuaia, Astatic subs/iia/a, Area Raulmi, 

 Perna Mulleti, Gervillia alcEformis [anccps), Corhis corriigata, 

 Cyprina angiilata, Paiiopaa plicata, Tn'gonia caudafa, T. dcrdalea, 

 Aporrhais robmaldina, Tcrebratida sella, the Coral Holocystis elegans, 

 etc. Phosphatic nodules occur in the Atherfield Clay at Stopham, 

 near Pulborouo-h. 



Hythe Beds. 



These beds were named by Mr. Drew in 1861, from Hythe, on 

 the coast of Kent. They consist of limestones, sandstones, and 

 sands, with iron-sandstone and chert. The limestone is of a 

 greyish-blue colour, and contains fine grains of quartz ; it is known 

 as 'rag' (Kentish Rag), hence the name Kentish Rag Series used 

 at one time by Fitton. The beds which alternate with the 'rag' 

 are known as 'hassock' or ' calkstone,' being sometimes a soft 

 calcareous stone, sometimes coarse impure sand or soft sandstone. 



Among the fossils of the Hythe Beds we find Plant-remains, 

 Chondrites, Pinites, etc. ; Annelides, Scrpiila variabilis ; Brachio- 

 poda, Tei-ebratella oblonga, Terebratida sella, Waldheimia tamarindiis ; 

 IMollusca, Plicatiila placunea, Exogyra simiata, Lima Cottaldina, 

 Gervillia anceps, Pecten orbicularis, Trigonia akaformis, T. spittosa, 

 Ammonites Deshayesii, A. Martini, A. furcatus, Ancyloceras gigas, 

 A. Hillsii; Fishes, Strophodus ; Reptilia, Igiianodoti, etc. 



Some beds in this division are largely made up of the detached 

 spicular remains of siliceous sponges.^ Many fossils have been 

 obtained from quarries north-east of Hythe. (See Fig. 60.) 



The Hythe Beds form the elevated and picturesque tract ex- 

 tending from Liphook, Haslemere, and Hindhead, to Leith Hill 

 (967 feet above sea-level), Limpsfield, Tilburstow Hill, and Seven- 

 oaks. 



The thickness of the Hythe Beds is at Hythe 60 feet, IMaidstone 

 about 80 feet, at Sevenoaks 160 feet, at Bletchingley near Nutfield 

 180 feet, at Leith Hill 200 feet, around Godalming and Guildford 

 240 feet, and at the Devil's Punch Bowl in the Hindhead district 

 probably as much as 300 feet. The beds occur also at Petworth. 



To the south-west of Dorking the beds comprise sand, sand- 

 stone, a few layers of chert and concretions of ironstone, and in 

 the higher part of the series there is a calcareous sandstone or grit, 

 known as Bargate Stone, which contains Avicula pectinata. This 

 stone occurs near Wotton and Abinger, on the top of the sands, 

 and is largely quarried near Godalming. Here, at Holloway Hill, 



1 Dr. G.J. Hinde, G. Mag. 1885, p. 324; Phil. Trans. 1SS5. 



