Abstracts of Papers read on Geology. 



453 



Eetween tlie Maentwrog and Delgelly horizons a series of curly 

 bedded flagstones have been detected. These are very similar to the 

 Ffestiniog Flags, and their position would seem to indicate that they 

 are of Ffestiniog age. The beds are badly exposed and have yielded 

 no fossils up to the present. 



Thus the Oldbury Shales represent a large proportion of the 

 Cambrian succession, and in view of this fact, and also of their 

 extreme thickness (2,000 feet), I propose a further subdivision of this 

 group, the classification of the whole succession being as follows : — 



Lower Tremadoc. 

 Dolgelly. 

 Ffestiniog. 

 Maentwrog. 

 Menevian . 



Merevale Shales 



Oldbury Shales 





Purley Shales 



Hartshill Quartzite 



Monks Park Shales 



Moor Wood Flags and Shales 



Outwoods Shales 



Abbey Shales 

 r Upper 

 . ^ Mid . 

 I Lower 



( Camp Hill Grit 

 . j Tuttle Hill Quartzite 

 [ Park Hill Quartzite , 



\ Menevian (?). 

 y Taconian. 



(3) Some tue-ther Kotes on Fal^oxyeis and other allied 

 Fossils, with special reference to some new features found 

 IN Vetaoafsula. By L. Moyset, B.A., M.B., F.G.S. 



SINCE the publication of a paper on Palceoxyris and other allied 

 organisms in 1910 ' so many fresh specimens have come to hand, 

 and, as was only natural, several previously unrecorded examples 

 have been described, notably some from the Lancashire Coal-measures 

 by Mr. J. "Wilfred Jackson,* that it seems desirable to record any new 

 features that have been found in the later material, and also any 

 new facts that may lead to the elucidation of the nature of these still 

 veiy enigmatical organisms. 



Taking in the first instance the genus Palceoxyris. The species 

 Palceoxyris Jielieteroides (Morris) has been lately found in very large 

 quantities in the Notts and Derbyshire Coal-field. In this area they 

 seem to be restricted to an horizon extending from the roof of the 

 Top Hard Coal downwards to above the Ell Coal ; a careful search in 

 the measures below, wherever these are exposed, has not resulted 

 in the discovery of any trace of this fossil. They were, some years 

 ago,^ discovered in great numbers in the open working of the Barnsley 

 thick coal at Worsborough, near Barnsley, where some 300 odd 

 specimens were collected by Mr. "W. Gelder from a space 6 or 7 yards 

 in circumference, together with some specimens of P. prendeli (Lesq.) 

 and P. carhonaria (Schimper). 



A hurried search in other claypits at horizons above and below this 

 coal during the Sheffield meeting of the British Association in 1910 

 produced enough specimens to make it probable that, if looked for, 

 they may prove to be similarly quite common fossils in the great 



^ L. Moysey, Quart. Journ. Geol. Soc, vol. Ixvi, pp. 329-45, pis. xxiv-vii, 

 1910. 

 ^ J. Wilfred Jackson, Lancashire Naturalist, January, 1911. 

 2 E. Kidston, Naturalist, 1897. 



