BRITISH CARBONIFEROUS BRACHIOPODA. 273 



Localities, Denbighshire. Characteristic Fossils and General Observations. 



Llangollen In dark "upper beds," near Trevor, Sp. trigonalis, 



S. duplicicosta, &c. In the "middle beds," 

 various Producta and Spirifera, but difficult to 

 extract from the matrix. In the " lower beds," 

 at the same place, small Terebratulce, Prod. 

 Cora, P. semireticulatus, var. Martini. In the 

 "lowest beds," continued on towards Minera, 

 Prod. Llangollensis. In the " topmost beds," ex- 

 tending towards the same place, Athyris Royssii, 

 with abundance of various Producta, P.fimbriatus, 

 P. Martini, Sp. glabra, Rhynchonella, &c. 



Fron, between Chirk and Llangollen 



Trevor, near Llangollen 



Eglwseg Ridge, near Llangollen 



Head of the Vale of Clwyd, ~ mile S. of Llomfour Prod, latissimus, Rh. pleurodon, and the usual 

 Chapel upper fossils. 



Caergwrle Hills, between Wrexham and Molef The common fossils of the upper beds. 



Abergele, North Wales v... Prod. Cora, P. semireticulatus, C. papilionacea. 



Best quarries are at Llysfaen. 



Great Ormes Head, near Llandudno Upper beds' usual fossils, in shale and debris of mine 



shafts, on surface of the cropping beds. 



Slope S. and escarpment W. of telegraph 



Hafod, 2 miles W. of Corwen, N. Wales An outlier. Beds correspond to those of the main 



belt ; upper portion worked. P. giganteas, P. 

 latissimus, P. scabricxdus, Spiriferidce, Rhyn- 

 chonella, &c. 



Derbyshire. — Add to the localities given at page 248, Low Fields, near Middleton, by 

 Yolgrave. 



Staffordshire. — Page 244, instead of seventy-eight species write eighty-five, and to the 

 tables add Athyris subtilita, Rhi/n. Wettonensis, Dav., Streptorhynchus Kellii, Prod. 

 Carringtoniana, Dav., Prod. KonincJciana, De Verneuil. 



Gloucestershire. — Add to the tables, Chonetes Buchiana, found by W. W. Stoddart 

 near Bristol. 



