﻿Vol. 6 I.] IN THE NORTH-STAFFORDSHIRE COAL-MEASURES. 511 



occur in a finely-laminated black shale, which constitutes the 

 roof of a thin coal previously unknown, and situated between the 

 Four-Feet Coal and the Dilhorne Coal of the Cheadle Coalfield. 

 At Draycott Colliery the coal with the marine roof-shale is 71 feet 

 2 inches below the Four-Feet Coal, and the section of the marine 

 band is as follows : — 



Thickness in feet inches. 



Dark-grey shale 4 Plant-remains ; Lingula mytiloides. 



Black, fissile shale 7 10 (Marine bed.) 



Coal 1 3 



A large amount of material, which proved to be highly fossiliferous, 

 has thus been examined from the sinkings of these shafts, and in 

 this work Mr. John Ward has co-operated with me. The fossils 

 as a rule were most beautifully preserved, and the following list 

 was obtained : — ■ 



[c. = common ; f.c. = fairly common ; 

 r.=rare ; n.r. — not rare ; 

 v.a. = very abundant.] 



Draycott -r, 



s-1 Borehole. 



Colliery. , 





Linqula mytiloides, Sow 



* 

 * 



in one layer. 



r. 



f.c. 



n.r. 



[v.a. 

 very large & 

 v.a. 

 c. 

 n.r. 



r. 



Productics scabriculus (?) Mart 



Leiopteria longirostris, Hind 



Myalina compressa , Hind 



Posidoniella, lesvis (Brown) 



Posidoniella sidcata, sp. nov 



Pterinopecten carbonarius, sp. nov. ... 



Pterinopecten papyraceus (Sow.) 



Dimorphoceras Gilbertsoni (Phill.) ... 

 Orthoceras 



* 



* 

 * 

 * 

 * 





Pleuronautilus pulcher, Crick 



Temnocheilus carbonarius, Foord 



Pellerophon 



Acanthodes Wardi, Esrert 



Acrolepis Hopkinsi, M'Coy 



Codacanthus elegans, Newb 



Lepidodendron 



Calamites 



Reed-like plant 



-X 







1 



The association of plant-remains with the marine mollusca is 

 worthy of remark, especially as none of the mollusca which are re- 

 garded as of freshwater origin were found intermingled with them. 

 This is the more noteworthy, as in the Borehole a bed containing 

 Carbonicola acuta and 0. aquilina, with Spirorbis attached, occurs 

 about 15 inches above the marine forms ; and, in working the shales 

 from the sinking, special care was taken to ascertain whether, in 

 this favourable juxtaposition of freshwater and marine forms, any 

 intermingling takes place. The result was, in this instance, a 

 decided negative. 



Again, it is interesting to note the occurrence of Lingula mytiloides, 

 which was a much-dwarfed form, in the uppermost layer of the 



