160 PROCEEDINGS COTTESWOLD CLUB 1903 
similar development of bed 19. It makes a very con- 
spicuous feature in the cliff, constituting a platform some 
feet wide at the south-eastern end of the section. Its 
surface is conspicuously ripple-marked, and there are also 
numerous other markings. The contained vertebrate 
remains are numerous and well preserved, but difficult of 
extraction. It is often known as the “‘ Upper Pxd/astra- 
Sandstone.” Mr Etheridge remarked that “at Aust, it 
[7.e., the ‘Upper Pullastra-Sandstone’] is not recognised 
in the form of a sandstone bed, but as indurated arenaceous 
shales, containing the same shells [as at Garden Cliff], 
and at Wainlode Cliff, as the light-coloured Sandstones of | 
the Bone-bed series—associated with Avzcula contorta.” ! 
The “ Pudlastra Sandstones” of Garden Cliff are an zxfra 
Bone-bed deposit, hence they must be sought for as such at 
Aust and Wainlode; for, as observed by Mr Etheridge, it is 
probable that “this chief Bone-bed [No. 15 in my section], 
was synchronously deposited over the area it now occupies 
in the west and south-west of England.”? At Aust Cliff, 
however, the Bone-bed rests either immediately upon the 
Upper Keuper “Tea-green Marls,” or is separated from 
them by 9 inches of black shale, whilst at Wainlode 
the intervening deposit is 2 feet of black shale. The 
evidence obtainable tends to demonstrate that the 
“ Pullastra Sandstones” of Westbury are not represented 
at Aust? or Wainlode Cliffs. 
About 18 inches of black shales, with a few thin sand- 
stone layers, separate this “ Upper Pzd/astra-Sandstone ” 
from the true Bone-bed, thus considered by Dr Wright, 
and Messrs Etheridge, John Jones and W. C. Lucy. It is 
extremely pyritic, and this phenomenon may account for 
1 Proc. Cotteswold Club, Vol. iii, (1865), p. 223. 2 Lbid. p. 224. 
3 Since the above was written, I have found the following statement by Mr Etheridge: 
“ The chief difference between the Aust section and Westbury consists also in the absence 
of the Pullastra beds at the base, and which are a most marked feature at the latter place.” 
Lbid.-V ol. iv. (1868), p. 17. 
