H. Kee^nng — The Zone of Nummulina elegans. 71 



the beds seen, commencing with the Brook Bed of Brackleshara, 

 are as follows : — 



(a) Brook Bed. 



(6) Grey sandstone or Tellina bed of Selsea. 



(c) Nummulina variolaria zone, measuring about 20 feet, being 

 quite full of these small Foraminifera. 



(d) Dark green sandy clays, with glauconite grains. This part of 

 the series I consider to be the equivalent of the beds just above 

 the Nummulina variolaria zone of Stubbington and Hunting 

 Bridge in the New Forest, which has been described by the 

 Eev. 0. Fisher.^ I could find no fossils sufficiently well pre- 

 served for identification in this part of the series. Thickness 

 about seventy feet. 



(e) A thin band of dark earthy-coloured sand, rather coarse : this 

 I did not find on the shore at low-water, where, however, I have 

 no doubt it occurs. Ostrea flahellula is fairly abundant in it. 

 The thickness is seven inches. 



This brings us to the bottom of the Nummnlina elegans^ zone, 

 which therefore is now shown to be of such wide extent and constant 

 occurrence that it seems more convenient lo adopt the Eev. 0. 

 Fisher's ^ classification, and take this horizon as the basement of the 

 Barton Series. 



(/) Nummulina elegans zone, consisting of rather dark green 

 and blue glauconitic sandy clays, much crowded in places 

 with Nummulina elegans. I was much interested in find- 

 ing this rich bed for the first time in this locality, as the 

 Brackleshara and Barton Series have not been found before in 

 juxtaposition with sufficient fossil evidence. There cannot now, 

 however, be any doubt of the existence of the Barton as well as 

 the previously known Bracklesham at Whitecliff Bay, as at that 

 locality the fossils give abundant evidence of the existence of 

 each. The following are the fossils from the Nummulina elegans 

 zone, which has a thickness of thirteen inches : — 



Dentaluim striatum, Sow. 



Typhis pungens, Brand. 

 Fusus btilbits, Brand 

 Cominella Solandri, Edw. 

 Pleurotoma exorta, Brand. 

 Valuta luctalrix, Brand. 

 ■jitalinn, Lam. 



Bulla, sp. 



Corhula pisum, Sow. 



Crassalella sulcata. Brand. 



Cardium semigranulaium. Sow. 



Leda minima. Sow. 



Ostrea fiiihdlula, Lam. 



Nummulina elegans. Sow. 



Mitra parva, Sow. 

 Galyptraa irochiformis, Lam. 



The specimens of Nummulina elegans at Whitecliff Bay are, 

 I think, somewhat finer than those at either Alum Bay or HighcliflF. 



[g) Pale blue and yellow sandy clays, with very few and badly 



preserved fossils. Thickness, 54 feet. 

 (Ti) A stiff laminated clay, with occasionally dark patches. Few 



or no fossils. Thickness, 18 feet. 



^ Quart. Journ. Geol. Soc. vol. xviii. 1862, p. 6.5. 



2 Formerly called N. Brestwichiana, but the recent researches of Prof. Eupert 

 Jones prove \\.io^& N. elegans. See his paper read before the Geological Society, 

 December 15th, 1886. 3 Op. clt. 



