CRETACEOUS GROUP. 39 



Fitton considers the Lower Green Sand capable of a triple 

 division. (Geol. Trans, vol. iv. p. 115.) The Neoco- 

 mian beds of foreign authors, are the equivalent of this 

 portion of the Cretaceous Group. The ChaUc formation 

 is an interesting feature in the geology of England, extend- 

 ing from Yorkshire and Norfolk to Dorsetshire, into Wilt- 

 shire, and diverging eastward through Hampshire, Kent, 

 Surrey, and Sussex, as seen on the geological map. 



LOCALITIES FOR FOSSILS, &c. 



Upper Chalk. - — Lewisham, Bromley, Northfleet, Kent ; Purfleet, 



Grays, Essex ; Basingstoke, Hants.; Norwich; Horstead, Brighton, 



Arundel, "Worthing, Sussex; Dane's Dyke, Yorkshire; Isle of 



"Wight. 

 Lower Chalk. — Burham and Dover, "Wrotham, Charing, Kent ; 



Southeram, Lewes, and many pits in that neighbourhood, Sussex ; 



Guildford, Dorking, &c., Surrey ; Swaffham, Norfolk ; Cherry 



Hinton, near Cambridge. 

 Chalk Marl. — Dover, Kent ; near Devizes and Calne, Wilts. ; Clayton, 



near Hurst, Sussex. 

 Bed Chalk. — Hunstanston, Norfolk ; Speeton Clifis, Yorkshire. 

 Upper Green Sand. — Alton, Petersfield, Hants. ; Godstone, Merstham, 



Surrey ; Earlstoke, Devizes, Warminster, WUts. ; Isle of Wight ; 



Blackdown. 

 Gault. — Folkstone, Charing, near Maidstone, Kent ; Hamsey, Ring- 



mer, Sussex ; near Devizes, Wilts ; near Cambridge. 

 Lower Green Sand. — Folkstone, Hythe, Pluckley; Boughton and 



Loose, near ^Maidstone, Kent ; Parham Park, Sussex ; near 



Devizes and Calne, WUts. ; Sandown, Shanklin, Atherfield, &c., 



Isle of Wight. 



The organic remains of the Cretaceous Group, with one 

 or two exceptions, are all marine, comprising Fucoidal 

 Plants, Sponges, Star-fishes, Mollusks, Crustacea, Fishes 

 and Eeptiles. The Echinoderms are abundant in the Upper 

 Chalk, and the Cephalopods in the Lower, and which also 

 e2 . 



