190 THE GEOLOGICAL STRUCTURE OF THE 



2. That the Upper Lias sands are stated to be 2 feet in 

 thickness ; " they pass downwards into the clays and shales 

 of the Lias beneath." They are said to undei'lie a shelly 

 bed which, together with the Ammonite-bed, is 5 feet in 

 thickness. From the list of fossils given it would seem that 

 the "Ammonite-bed" is what we shall call presently '"the 

 Ironshot Oolite.' As to the sands, we lind sandy limestone 

 and marl at about the position indicated ; and we think it 

 probable that these are the strata which Mr. Etheridge 

 referred to "Upper Lias Sands." However, they yield 

 Terehratula Endesi, Oppel, and T. cortonensis, S. Buckman, 

 indicative of a much later date {see Table II., facing p. 212). 



In regard to the other beds we would make the following 

 remarks — 



" ISTo. 5. — The Uagstones of Dundry forming the zone of 

 Ammonites Parkinsoni." There is evidently some confusion 

 here. The description and the fossils given answer partly 

 to what we call 'the Coralline beds,' and partly to our 

 ' Terehrahda Eudesi-heds.^ 



" jN'os. 6 and 7. The Building-stone." This is said to be 

 the highest set of beds at Dundry ; but we find them to be 

 covered by several feet of Coralline Limestone. 



In 1875 E. B. Tawney^ noticed Dundry and Mr. 

 Etheridge's communication thereon, observing that the 

 succession of beds as given by the author cited is open to 

 some doubt. On his own part Tawney remarks that " ^4. 

 Murcliisonce, Soicerhyi, and Humphriesianus seem to occur 

 together." 



James Buckman^ considered the beds at Dundry and at 

 Bradford [Abbas] to be on the same horizon, and that they 



^ 'Bristol and its Environs,' — published under sanction of local 

 Executive Committee of Brit. Assoc. (1875). — 'Inferior Oolite,' by E. 

 B. Tawney, p. 378. - Quan. Journ. Geol. Soc, vol. xxxiii. (1877), p. 3. 



