﻿506 



MR. J. T. STOBBS ON THE MARINE BEDS [Aug. 1905. 



The list from this horizon is confined to the following :- 



[v.a.=very abundant.] 



Sneyd 



Colliery. 



No. 10 



Berry 

 Hill. 

 No. 12 



Florence 



Colliery. 



No. 19 



Silver- 

 dale. 

 No.l 



PI. XXXIV. 



Lingula mytiloides, 

 Sow 



* 





* 



* 



* 



v.a. 

 y.a. 



Myalina compressa, 

 Hind 









With respect to these forms, they were found quite distinct and 

 separate from each other. The Lingulce were distributed through 

 the shale and, what was rather remarkable, were also found in the 

 upper portion of the Cannel Coal itself at Sneyd and at Silverdale. 

 They are very numerous, but diminutive and dwarfed, and in this 

 feature contrast markedly with those found in the marine bed 

 overlying the Moss Coal (see p. 505). The Myalince were, in every 

 instance, confined to a very thin layer of the shale. 



(7) Marine Bed over the Seven-Feet Banbury Coal. 



In 1900 Mr. Wilmot Scrivens brought some fossiliferous 'bullions* 

 to me, for the purpose of having the fossils named. It was then 

 discovered that they were from a hitherto-unknown marine bed ; 

 and, as the underlying coal-seam was widely worked in North 

 Staffordshire, efforts were at once made to trace the bed, with 

 the result that it has been found in situ at Leycett (2 in 

 PI. XXXIV), Hayes Wood (No. 3), Minnie Pit, " Halm erend 

 (No. 4), Talk o' th' Hill (No. 5), Birchenwood (No. 6), Sneyd 

 (No. 10), and Norton Collieries (No. 8) ; that is, right across the 

 Coalfield from west to east. 



The following sections show the relation of this horizon to the 

 Seven -Feet Banbury Coal : — 



(a) Birchenwood Colliery (No. 6, PI. XXXIV). 



Thickness in feet inches. 

 Dark-grey shale, with few bullions 5 (Marine horizon.) 



Hard, compact black shale 3 Beyrichia arcuata. 



Dark shale 1 10 Carbonicola acuta. 



Fourth Elder Coal. 



Shales 3 7 



Third Rider Coal. 



Shales 6 6 



Second Rider Coal. 



Shales 15 



First Rider Coal. 



Shales 100 



Seven-Feet Banbury Coal. 



