100 GREY CHALK MARL. 



and variety of their fossil remains. I shall proceed to notice a few of 

 the more interesting localities. 



A low bank at Middleham, in the parish of Eingmer, near the seat of 

 the Kev. J. Constable, contains hamites, turi'ilites, ?iaiitilites, ammonites, 

 and inocerami. The largest turrilite hitherto discovered was collected 

 near this spot, and is figured in Min. Conchology, tab. Ixxiv. 



Stoneham, near Lewes ; from a marl bank in a field adjoining the turn- 

 pike-gate, I have collected the same kinds of fossils as at Middleham ; also 

 rostellaricB, auricula, scaphites, &c. 



Hamsey Marl Pits. The hillock, of which these pits present a vertical 

 section, is insulated by the river Ouse. The quarries are situated on the 

 north side of the church, and are about 25 feet high. The strata are 

 sUghtly inclined, and vary from a few inches, to a foot or more in thick- 

 ness ; the indurated layers, are separated by intervening seams of a soft 

 loose marl, of a dark colour. The face of the rock is traversed by innumer- 

 able crevices, which, in some instances, are parallel with the stratification, 

 and in others assume a vertical, or transverse direction. 



The lowermost strata are of a blueish grey colour, indicating a transi- 

 tion to the blue marl, into which the grey marl passes, at the depth of 

 a few yards. These quarries contain sulphuret of iron, and spicular 

 crystals of carbonate of lime ; the former often composes the constituent 

 substance of the fossils, the latter occurs in groups, lining the fissures 

 and cavities in the marl. The organic remains found in these pits are 

 very numerous, and present considerable interest. They consist of several 

 species of ammonites, nautili, tun'iUtes, scaphites, hamites, the teeth and 

 vertebrae of sharks ; the supposed fir cones of Cherry Hinton, &c. 



Offham Pit. This excavation Hes on the road-side, between Off'ham 

 and Cooksbridge ; it produces ammonites, nautili, turrilites, scaphites, &c. 



Clayton, near Hurstperpoint. A marl pit at this place, has afforded 

 to the researches of Mr. Weekes, turrilites, hamites, ammonites, scaphites, 

 &c. 



In other localities of the marl, the fossils are less abundant than in 



