Dr. FiTTON on the Strata below the Chalk. 127 



to rhomboids ; and sometimes^ as in Septaria, they are thick in the middle of 

 the beds, thinning* off towards the top and bottom. 



(34.) Some of the best sections of the group (c.) are to be found in the 

 quarries about Seabrook*. In one of these the order was thus : — 



Feet. In. 



1. Very green-sand, alternating with courses formed principally of stem-like or 



vermicular branches of whiter sand, and including ferruginous patches. The 

 petrifactions of this bed are very numerous. Gryphtsa sinuata in great 

 abundance. 



2. A group of stone beds ; separated by yellowish calcareous sand and clay, called 



"Hassock" by the quarry-men. The upper portion especially abounds in 

 petrifactions. The beds of stone are 18 inches to 2 feet in thickness: they 



are concretional, but nearly continuous. 



The total thickness visible is about 12 



(35.) The lower beds are extensively worked in quarries^ both for building- 

 and lime-burning, at Pluckley on the north-west, and at Great Chart on the 

 south-west, of Ashford ; and generally along the outcrop west of Aldington 

 Corner, where the Weald-clay comes very near to the stony strata^ a few feet 

 only of sand rock being interposed. The line of junction is almost every- 

 where marked by the coming out of springs. The beds are nearly horizontal ; 

 and though the stone occurs in continuous masses, of sufficient size to answer 

 well for building, these are evidently concretional. The interior of the blocks 

 is frequently of a blueish colour, containing throughout minute dark grains : 

 the exterior crust is brown. 



(36.) The following is a list of the fossils which 1 have obtained or col- 

 lected from the Lower Green-sand of this neighbourhood; in which, however, 

 those of the three groups are not always distinguished : the statement of 

 localities containing all that I find upon this point in my notes. 



Fossils of the Lower Green-sand, in the vicinity of Folkstone. 



Ammonites furcatus. Pi. XTV. f. 17. Lowest beds near Hythe. F. 



A Monile. Between Sandgate and Folkstone. S. and Min. Conch. 



A Nulfiddiensis . Hythe. Also Nutfield, Surrey. Min. Conch. 



A . Fragments of a very large new species occur in greenish " rag," at the 



bottom of the lowest beds of stone, in the quarries above Hythe. H. 

 Anomia laevigata. PI. XIV. f. 6. In Kentish rag, near Sandgate. S. and So. 



Lympne. H. 



* Those near Court-at-Street, which have furnished so many fossils to the collection of Mr. Hills, 

 I have not examined. 



