156 Dr. FiTTON on the Strata below the Chalk. 



(74.) The junction of the sands and clay^at Stopham brick-yard, on the west 

 of Harvvood's Green, near Pulborough, affords the only indications that have 

 come to my knowledge, of any interruption or disturbance between the de- 

 position of the upper part of the Weald clay, and of the incumbent Lower 

 green-sand. The surface of the clay at the place in question is hollowed into 

 irregular roundish cavities, at the bottom of which portions of green-sand were 

 found, including several of the characteristic fossils of that formation ; while the 

 clay, immediately below, is equally characterized by the presence of Cypris. At 

 the junction, the clay was mixed with sand; and specimens of Panopcea plicata 

 were found even two or three feet within nearly pure clay, along with ferru- 

 ginous concretions, containing fossils of the Wealden, impressions of Cyclas, 

 Cypris, and remains of fishes: and this mixture was observable to the depth of 

 several feet; — so that both the sand and clay must have been at the time of 

 mixture in a state of softness ; or the sand must have been introduced over 

 a surface of argillaceous mud, before it had consolidated. When 1 had the 

 pleasure of examining the place, with Mr. Martin, the circumstances were 

 unfavourable to observation : and, as the junction of the two formations 

 here, is on the slope of a hill, it might have been doubted whether the 

 appearances could not be explained by the effects of subsidence producing 

 intermixture, during very rainy weather, or under water, before any of the 

 strata had emerged. Mr. Martin, however, who had seen the place when the 

 phenomena were better exhibited, is of opinion that this explanation of them 

 would not have sufficed. In this brick-yard, the loamy sand found near the 

 junction is used «/owe for making the bricks; sand being- required in the 

 manufacture, only for sprinkling the moulds. 



(75.) List of Fossils from the Beds below the Chalk, in part of Hampshire 



and Western Sussex. 



[Upper Green-sand.^ 



The following List of Fossils from the Upper green-sand in the vicinity 

 of Petersfield, in addition to those mentioned in Mr. Murchison's paper on 

 that district, (Geol. Trans. 2nd Series, vol. ii. p. 99.) I owe to the kindness 

 of Mrs. Murchison, in whose collection the specimens are placed. 



Ammonites catillus. 



A- splendens. 



Area carinata. 



Avictda gryphaeoides. (See PI. XI. f. 3.) 

 Cucullcea. Much compressed. 

 Echino-spatangus. (Three new species.) 



Fishes. Scales and vertebrae. 

 Gryphcea coliimba. 



G vesiculosa. 



G sinuuta. 



Nautilus elegans ? ? Much compressed. 

 Pecten asper. 



