﻿Vol. 6 I. j OF THE MARINE BAXDS IN TEE COAL-MEASURES. 539 



Glyphioceras micronotum is a smooth compressed form : the 

 inclusion is almost complete, and there is a very small umbilicus. 



Locality. — North- Staffordshire Coalfield: below the Gin-Mine 

 Coal. 



Glyphioceras paucilobum (Phillips). 



Dr. A. H. Foord has recognized this species in concretionary 

 nodules which occur over the Seven-Feet Banbury seam. So far as 

 I can ascertain, only one specimen of this species, probably the type, 

 is in the National Collection at the British Museum (Natural 

 History). The locality of the specimen was unfortunately not 

 recorded. 



J. W. Salter records the occurrence of this species from the 

 Holcombe-Brook Series above the Second Coal (Millstone- Grit 

 Series). 1 



Dimorphoceras Gilbertsoni (Phillips). (PI. XXXV, fig. 32.) 



This species is, when well preserved, very finely marked with 

 sinuous lines and ridges. It is much compressed, and has a 

 minute umbilicus. Its maximum appears to. be in the Pendle- 

 side Series. Its lowest appearance is in beds immediately suc- 

 ceeding the Carboniferous Limestone, alike in West Clare and in 

 the Valley of the Hodder. It is also plentiful in the Lower Coal- 

 Measures of Lancashire. Now, its range is extended much higher 

 in the Coal-Measures. Mr. J. Neilson reports the occurrence 

 of Dimorphoceras Gilhertsoni from the Lower Limestone Series of 

 the West of Scotland. 



Localities. — North-Staffordshire Coalfield: 71 feet below the 

 Pour-Feet Coal, Cheadle ; below the Gin-Mine Coal, Nettlebank. 



Lancashire Coalfield: above the Bullion Mine, Sholver. Pendleside 

 Series : in ' bullions,' Horsebridge Clough, and Crimsworth Dean, 

 near Todmorden ; The Coombs, Leek (North Staffordshire). 



Gastrioceras carbonarium (L. von Buch). (PI. XXXVI, fig. 1.) 



This species appears to have its maximum in the Lower Coal- 

 Measures, but also occurs in the Pendleside Series at Horsebridge 

 Clough, near Todmorden ; and now we know it from the marine 

 band below the Gin-Mine Coal in North Staffordshire. This 

 species is also plentiful in the Upper Culm-Measures of Instow 

 and Clovelly (Devon). 



Gastrioceras carbonarium generally occurs in association with 

 G. Listeri and Dimorphoceras Gilbertsoni; it is relatively somewhat 

 more compressed, and its periphery is more convex than in 

 Gastrioceras Listeri. 



Localities. — North-Staffordshire Coalfield : below the Gin-Mine 

 Coal ; over the Stinking Coal, Cheadle. 



Lancashire Coalfield : above the Bullion Coal and its equivalents. 



1 'Geology of the Country around Bolton-le-Moors, Lancashire' Mem. 

 Geol. Surv. 1862, p. 34. 



