628 



FAUNAL SUCCESSION OF THE UPPER BERNICIAN 



Fannal List (continued). 



>1 



tuO 



-1- 



o 

 c 

 -2 





w 



u 



M 



m 



Chonetes cf. hardrensis (Phill.) ... 



- 





- 





Lingula squamiformis, Phill. 









- 



Aviculopecten sp. 







- 



- 



Pinna flabelliformis (Mai't.) 





- 







Allorisma sulcata (Flem.) 



- 









Edmondia expansa, Hind. 







B 





Nuculana attenuata (Flem.) 



- 









Grammatodon semistriatus (Mart.) 





- 







Euomphalus pentangulatus, Sow. 









_ 



Loxonema sp. ... ... 



- 









Orthoceras sp 









- 



Pleuronautilus sp. 



- 









Archffiocidaris urei (Flem.) (plates) 









- 



Platycrinus rugosus, Miller (plates), cf. 

 fig. in Portlock's Geology of London- 











derry, pi. i6, fig. 3 



- 









Rhodocrinus sp. 



- 









Phillipsia eichwaldi, Fischer 



- 



- 



- 





Notes. — The Dibunophyllum mnirheadi of this horizon 

 presents typical forms of the species and strongly Aspido- 

 phylloid variants. Although I have only found the species at 

 Thornbrough, it is hardly likely that the coral is restricted to 

 this locality. The Cyclophylla attain considerable size. The 

 whole horizon is richly fossiliferous, especially the central shale. 



The Robsheugh Limestone. 



Geographical Distribntion. 



The Geological Survey have mapped this limestone from 

 Whittle Dene Waterworks, Harlow Hill, to Belsay, east of the 

 Hall. 

 Stratigraphical Character. 



Thickness at Robsheugh i6 feet. The upper part of the 

 bed is shaly. 

 Faunal Diagnosis. 



Corals. — Cyclophylhim 2JS.. pachyendothecnm abundant. 



t Uuder Belsay are recorded one or two forms from Bygate (indicated by a B), 



