﻿Vol. 61. 



UPPER PORTION OF THE COAL-MEASURES. 



315 



Mr. Macconochie and myself in 1902, when the following species 

 were collected : — 



Pecopteris arbor escens (Schl.). 

 Pecopteris (Cyatheites) sp. 

 Alethopteris aquilina (Schl.). 

 Atetkopteris Grandini (Brongn.). 

 Alethopteris Serli (Brongn.). 

 yeuropteris flexuosa, Sternb. 

 Neuropteris ovata, Hoffm. 

 Neuropteris Scheuckzeri, Hoffm. 



Calamites undiilatus, Sternb. 



Catamites sp. 



Calamocladiis equisetiformis (Schl.). 



Annularia radiata, Brongn. 



Annularia stellata (Schl.). 



Lepidodendron fusiforme (Corda). 



Lepidophyllum sp. 



St ig maria ficoides ( Sternb. ). 



These beds I unhesitatingly refer to the Upper Coal-Measures, 

 but at the same time regard them as identical with the Keele 

 Group of North Staffordshire. 1 



Before proceeding farther, it will be well to collect all the plant- 

 records from the Keele Group, with which I correlate the plant- 

 bearing beds of Jockie's Syke (Cumberland), and the upper part of 

 the ' Red Rocks ' passed through in the Hamstead Boring at Great 

 Barr, near Birmingham ; those from the JSTeweastle-under-Lyme 

 Group, the Etruria-Marl Group and the Blackband Group of North 

 Staffordshire, as these have been denned by Mr. Walcofc Gibson. 2 



These beds are known, in part or in whole, to occur in South 

 Staffordshire, Shropshire, Denbighshire, Nottinghamshire, Lanca- 

 shire, and Cumberland, and also in the South- Wales Coalfield, 

 Somerset, and the Forest of Dean ; and they may occur in York- 

 shire as well. But in some of these counties, although there is no 

 doubt as to the occurrence of these groups in part or in whole, they 

 still require further examination before their full extent can be 

 determined. 



In connection with this subject, reference must be made to the 

 fossil plants of the ' Ardwick Series ' of Manchester (which have 

 been described by Mr. E. A. N. Arber), and the evidence which they 

 afford as to the age of the beds discussed, with the result that he 

 ascribes the Ardwick Series to my ' Transition Series.' 3 This 

 is most probably their position, but the exact horizon of the 

 specimens examined by Mr. Arber was not ascertainable. The plant- 

 evidence, however, shows clearly that part of the Ardwick Series, if 

 not the whole, belongs to that group of rocks which have been 

 termed the Transition Series, and are so well developed in 

 the Potteries Coalfield (North Staffordshire). 



1 B. N. Peach & J. Home, ' The Canonbie Coalfield : its Geologieal 

 Structure & Relations to the Carboniferous Rocks of the North of England & 

 Central Scotland' Trans. Roy. Soc. Eclin. vol. xl (1903) p. 858 ; and R. Kidston, 

 ' The Fossil Plants of the Carboniferous Rocks of Canonbie (Dumfriesshire), 

 & of Parts of Cumberland & Northumberland ' ibid. p. 802. 



2 Mem. Geol. Surv. 1902, ' The Geology of the Country around Stoke-upon- 

 Trent ' pp. 35-47. 



3 Mem. & Proc. Manch. Lit. & Phil. Soc. vol. xlviii (1903) no. 2, pp. 22-23. 



