ESTHERIA ELLIPTICA. 107 



before referred to) forms part of the cliff (about 10 feet); and, according to Mr. Beckles, 

 (' Quart. Journ. Geol. Soc.,' 1856, vol. xii, p. 290) is succeeded by — 



Feet. 



Sandstone 4 



Slate-coloured, compact clay 7 



Light-coloured clay 4 



Dark clay. (The lowest hed seen in the Sussex Cliffs.) 



5. Another locality for E. elliptica, var. sub quadrat a, is a low cliff, nearly two miles 

 west of St. Leonard's, and three and a half west of the East Cliff, Hastings. It is at the 

 first rising of the cliffs between St. Leonard's and Bexhill. The geological position of the 

 shales forming this low cliff at Bulverhithe, and rich with Estherice, is not clearly evident 

 at first sight, on account of the valley intervening between Bopeep (St. Leonard's) and 

 Bulverhithe. It is probable that, by means of a fault of considerable downthrow, the 

 upper portion of the Hastings Sand series has been here lost to sight, and that the 

 section at Bulverhithe commences with beds lower in the series than the thick, soft sand- 

 stone of the Castle Rock, Hastings, and of the cliffs behind the western end of St. 

 Leonard's. In this case the Estherian Shales at Bulverhithe would be at nearly the same 

 horizon above the clays at the base of the series there, as Mr. Binfield's clays with Estheria 

 are with respect to the lower clays of the eastern cliffs. The following is the section of 

 the strata in the cliff at Bulverhithe and the succeeding cliffs to the westward. 



Section of the Bulverhithe and Bexhill Cliffs, Sussex. 



Feet. 



Yellowish-brown and grey shales, with a thin, grey ironstone 7 



Bluish-grey and brown shales, with sandy seams. A few Estherice 2\ 



Brown and blue shales, and sandy seams. Estherice abundant, especially in the 



lowest bed 1\ 



Sandstone, and three shaly seams 20 



Hard sandrock, with concretions and irony seams . .' 4 



Finely laminated grey sandstone and shale, with ferruginous concretions 3 



Ferruginous sandrock 4 



Soft, clayey, ferruginous, concretionary sandrock, blue-hearted 4 



Ferruginous sandstone, with a seam of grey shale About 10 



Sandstone. (A well-marked stratum) 4 



Dark-grey, sandy, lignitiferous shale, with a ferruginous band 3 



Grey shale 3 



Ferruginous sandstone 3 



Olive-brown and bluish shales 6 



Sandrock and ferruginous band 4 



Red and mottled clay, concretionary, and containing irregular bands of stone. 



More than 20 feet seen. 



