6tO FAUNAL SUCCESSION OF THE UPPER BERNICIAN 



The Calcareous Beds lying between the Scar Lime- 

 stone and the Fourlaws Limestone, Tyne and 

 Rede District. 



Time has not allowed of a systematic examination of these 

 limestones. In the country north of the Tyne are some ten 

 or so of them, which, although little quarried, are exposed in the 

 numerous burns. To the west of the North Tyne a number 

 of quarries afford access to them. 



These limestones mainly belong D2, but the lowest of them 

 yield forms characteristic of Dr. 



The limestone which lies above the Fourlaws Limestone, 

 and which is exposed in Shanks Kiln Quarry, contains in 

 addition to forms common to Di and D2 : 

 CampophyUuin derbie/ise,^ Vaughan. 

 Cyathophyllum iniirchisoni, Ed. and H. 



Through the kindness of Miss Dinning of Simonburn, I 

 have had the opportunity of examining a number of forms she 

 has collected from the shale exposed by one of the burns in 

 that neighbourhood. The shale represents a low horizon in 

 II of the table on p. 598, but occurs some distance above the 

 limestone previously mentioned. 



? Productus longispinus, Sow. 



Dibunophyllids. 



Lithostrotion (? irregulare) (Phill. ) 



Lithostrotion maccoyamun, 



Ed. and H. 

 Fenestella sp. 

 Rhabdomeson sp. 

 Athyris planosulcata (Phill.) 

 ? Seminula sp. 

 Reticularia lineata (Mart.) 

 Rhipidomella miclielini (L'Eveille ) 

 Orthotetids. 

 Productus a. 

 Productus latissimus, Sow. 



Productus muricatus, Phill. 

 Productus semireticulatus, Mart, 

 ? Productus martini, Sow. 

 ? Chonetes buchiana, de Kon. 

 Aviculopecten dissimilis (Flem.) 

 Pseudamusium anisotum (Phill.) 

 Amusium concentricum, Hind. 

 Actinopteria persulcata (M'Coy.) 

 Pteronites latus (M'Coy.) 

 Pinna mutica (M'Coy). 

 Archaeocidaris urei (Flem.) (plates) 

 Encrinital columns very numerous. 



The lamellibranchs constitute a group of forms characteristic 

 of the muddy conditions of deposition. f 



* Found by Mr. John Dunn, 

 t Dr. Wheelton Hind. 



