FAUNAL SUCCESSION OF THE UPPER BERNICIAN 



631 



Faunal List (continued). 



Euomphalus pentangulatus, Sow. 

 Loxonema imperidens, M'Coy ... 

 Platyceras sp. (young form of P. neritoides, Phill., 



or P. vetustum (Sow.)* ... 

 Phillipsia sp. ... 

 Poecilodus jonesii (M'Coy) 



The following additional forms are contained 

 in Professor Lebour's lists of Fell Top Limestone 

 fossils, f 



Lingula squamiformis, Phill. 



Macrocheilus sp. 



Murchisonia sp. 



Orthoceras attenuatum, Flem. 



Poteriocrinus nuciformis, M'Coy 



Poteriocrinus sp. 



Griffithides farnensis, Tate 



Griffithides sp. 



Chomatodus cinctus, Ag. 



Petalodus acuminatus, Ag. 



Notes. — The shale, especially the upper bed, is con- 

 spicuous on account of the great quantity of encrinital 

 columns, Fenestella, and crushed and fragmentary shells that 

 it contains. These are of a white colour, and give an unmis- 

 takable identity to the bed. Lithostrotion junceiim is present 

 in most of the Bernician limestones, but it is particularly 

 abundant in the "Fell Top" and the " Redesdale." The 

 Z.y//;z<r^/^OT characteristic of the latter bed possesses remark- 

 ably long and straight corallites, whereas that typical of the 

 Fell Top Limestone is stunted and tortuous in growth. 

 Lithostrotion portlocki is also abundant in the Redesdale 

 Limestone, and the smaller variety L. maccoyanum occurs in 



* Determined by Dr. Bather. This and several other forms in faunal list of 

 this and the Thombrough Limestone were collected by Mr, G-. Weyman, 



t * See Lebour — Geology of Northumberland, page 110, 



