50 PROCEEDINGS COTTESWOLD CLUB 1910 



Dr A. Vaughan, and of those at Sodbury Cliff noticed by 

 myself. I think beds 21 and 22 are also probably Upper 

 Rhsetic. 



The White Lias and subjacent " Upper Rhaetic " beds of 

 my previous papers, should, I think, be grouped together 

 to form the Upper Stage of the Rhaetic Series. The reason 

 why the Pteria-contorta Black Shales, the " Upper Rhaetic " of 

 my former papers, the White Lias, and the Lower Lias lime- 

 stones are usually so distinctive from one another, both as 

 regards faunal and lithic characters, is, because in most sections 

 they are non-sequentially related. 



