﻿504 



ME. J. T. STOBES ON THE MARINE BEDS [Aug. I905. 



and the non-marine shales of the Coal-Measures, to assist the 

 worker. After long and fruitless search at many collieries, I was 

 delighted when a student brought to me a specimen from the 

 Florence Colliery, which at once allowed of the horizon being located 

 and examined in situ. It is probable that this horizon is the lower 

 marine bed discovered by Amison in 1865, to which reference has 

 already been made (p. 500). 



At the Florence Colliery the upper portion of this deposit was 

 crowded with Lingula mytiloides, scattered throughout the shale, 

 and not confined to one 'parting' or bedding-plane. The in- 

 dividuals were unusually large and well developed, and no other 

 forms were associated w T ith them. 



The following list has been obtained from this bed : — 



[c. = common ; v. a. = very 

 abundant.] 



Slippery Florence Speed- 

 Lane. 1 Colliery, well ? 

 No. 11 No. 19 

 (PI. XXXIV). (PI. XXXIV). 





Lingula mytiloides. Sow 



Ctenodoita Icevirostris, Portl. ... 

 Edmondia sp 



i * 



* 



# 



# 



* 



* 



1 



* 

 * 



v.a. 



- 



Nucula 



Pterin oped en pa/pyraceus (Sow.) 



Pleuronautiliis sp 



i Gon iatites 



Beyrichia arcuata, Bean 



(5) The Marine Bed above the Moss Coal. 



This bed was discovered in 1894 by Mr. John Ward, during the 

 sinking at Longton-Hall Colliery (18 in PI. XXXIV). The position 

 of the horizon with respect to the Moss Coal was ascertained by 

 Mr. G. A. Mitchesou, F.G.S., to whom I am indebted for the 

 following section : — 



Thickness in feet inches. 



Sandstone 8 10 



Black bass 16 6 (Marine bed.) 



Fireclay and strong shales 5 r n , . 7 , . 7 „ 



Black bass 2 j Carbomcola turyzda & 



Lean ironstone-band 6 l C ' acuta " 



Soft shale 2 



Coal 1 2 



Soft fireclay, with bands of stone. 4 



Sandstone 27 



Black bass 15 



Sandstone 8 6 



Shales 6 



Black and grey shales 33 



Moss Coal .". 4 3 ('Sinkers' thickness.') 



The only form discovered in the marine ' black bass ' was Lingula 

 mytiloides, Sow., but it occurred in numbers so large as to stamp 



