NORTHUMBERLAND AND DURHAM. 235 



IX. — Notes on The Permian System of Northwnherland and Dur- 

 ham; being a Supplement to the Catalogue of Fossils of the 

 Permian System of these Counties. By RicnARD IIowse.* 



[Head March 12, 1857.] 



Since I liad the pleasure in 1848 of drawing np *a Catalogue 

 of the fossils of the Permian System, collected Ly myself 

 in the counties of Durham "and North umLerland, at the request 

 and for the u.^^e of the Tyneside Naturalists' Field Cliih, 

 I have on every convenient opportunity been engaged in pro- 

 secuting the same studies, Loth in the cabinet and in the field. 

 The works that have appeared since, by Dr. Geinitz and Mr. 

 King, have also been subjected to a very careful examination. 

 B}^ the assistance of fresh specimens and a careful examination 

 of old and new sections, I am enabled to correct many important 

 inaccuracies which the latter author has made, and also to rectify 

 some of my ovvai earlier statements. 



That the distribution of the fossils of this system may be 

 better understood, I have drawn up the following account of the 

 stratigraphical order of these rocks, from notes and sections col- 

 lected during the last fifteen years. All the most important 

 sections were revisited last autumn, to prevent as far as possible 

 any mistake. 



PERMIAN SYSTEM. 



1. Lower Bunter ? 



A deposit of reddish sandstone appears in two or three places 



in the south-easternmost part of the county of Durham. It is 



generally so completely covered up with alluvium as to admit of 



very imperfect examination, and its fossils are entirely unknown. 



Log. Seaton-Carew, Preston-on-Tees, Coatham-Stob. 



2. Magnesian Limestone. 

 Upper. 

 1. Upper- Yellow-Limestone. — A deposit of yellow, earthy, 



* Revised from the Annals and Magazine of Natural History for January, 1857. 



