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THE GEOLOGIST. 



I have discovered in the Oxford clay at Newport-Pagnel. It is an 

 elegant fossil, but by no means common. 



Intercalated with the Oxford clay, in some places, there are frag- 

 mentary portions of a hard limestone containing several fossils, and 

 among them Rostellaria trifida and Ammonites Calloviensis. This 

 stone probably represents the Kelloway rock of Yorkshire, &c, but is 

 rarely found in this part of England. The following is a list of the 

 fossils which have been found in the Oxford clay of this district : — 



Name. 



Ichthyosaurus communis, Con. 

 Plesiosaurus 



Ammonites Lambertii, Sow. 



„ Elizabeths, Pratt 

 Belemnites Owenii, Pratt ... 



„ breviatus, Miller 

 Rostellaria trifida, Phil. ... 

 Cerithium 



,, Damonis 

 Ostrsea gregaria, Sow. 

 Gryphsea dilatata, Sow. 

 Modiola imbricata, Sow. . . . 

 Thracia(l) 



Locality. 



Newport-Pagnel. 



Little Lindford. 



Wolverton. 



Newport-Pagnel. 



Wolverton. 



Stoke Goldington. 



Newport-Pagnel. 



Newport-Pagnel. 



Newport-Pagnel. 



Wolverton. 



Wolverton. 



Wolverton. 



Newport-Pagnel. 



In addition to these, I have found certain doubtful forms, pro- 

 bably opercula of some mollusc ; also an abundance of lignite, and 

 occasional impressions of small cones (?). The Oxford clay, flanked 

 by the Lower Greensand and Gault on the one side, and by the Lower 

 Oolites on the other, extends on towards Cambridgeshire and Hun- 

 dington in a north-easterly direction. 



Next in order appears the Cornbrash, which is but insignificantly 

 represented. It consists of yellowish white limestones very full of 

 fossils. The principal localities for these are near Stoney-Stratford 

 (where, as Mr. Brodie informs me, he observed many corals), Wol- 

 verton, Olney, and the neighbourhood of Northampton ; also Gayhurst 

 (Bucks), where several fossils have been found. A very common 

 shell here is Astarte aliena; also a small species of Trigonia, probably 

 T. impressa, which is also found near Wolverton. The following 

 fossils were also found : — - 



Name. 

 Pycnodus (teeth of) 

 Nucleolites clunicularis, Llhwyd .. 

 Holectypus depressus, Lam. 

 Diadema Bakeries, Wright 

 Ostrsea gregaria, Sow. 

 Panopsea (a long species) 

 Modiola imbricata 

 Lima duplicata, Sow. 

 My tilus sublaevis, Sow. 



Locality. 



Gayhurst. 

 Gayhurst. 

 Gayhurst. 

 Northampton. 

 Common everywhere. 

 Gayhurst. 

 Rowley pits. 

 Gayhurst. 



Gayhurst, Grendon. 



