92 Reports and Proceedings — Geological Society of London. 



the Lower Mottled Sandstone ; but, on following the outcrop north- 

 wards, the Upper Limestone is seen to grow in importance and the 

 Lower Mottled to diminish, until, in South Yorkshire, it is not found. 



The Permian rocks continue to increase in thickness and the Bunter 

 to diminish, until the Pebble Beds also become unrecognizable, in 

 North Yorkshire. Also the Middle Marl now fails, and a thick mass 

 of limestone remains to represent the Permian. The Keuper Water- 

 stones persist throughout, and seem to be slightly unconformable to 

 the Bunter. 



Prom these considerations it is believed that the Upper Magnesian 

 Limestone and Upper Marl of the northern part of the outcrop are the 

 time equivalents of the Bunter of South Nottinghamshire, the one 

 being deposited in an inland sea, comparable with the Caspian, the 

 other along the coastline, which was slowly moving northwards. 



The palaeontology of the Upper Magnesian Limestone is discussed, 

 and the evidence derivable from the fossils is shown to be not 

 unfavourable to the above view. 



2. January 11, 1911.— Professor W. W. Watts, Sc.D., M.Sc, F.B.S., 

 President, in the Chair. 



The following communications were read: — 



1. "The Zonal Classification of the Salopian Bocks of Cautley and 

 Bavenstonedale." By Miss G. B. Watney and Miss E. Gr. Welch. 

 (Communicated by J.*E. Marr, Sc.D., P.B.S., E.G.S.) 



The district described lies north-east of Sedbergh and west of the 

 Dent Fault. An account of the literature treating of previous work 

 is given, and the succession of the zones is described. They are as 

 follows : — 



fD 3. Zone of Monograptus leinhvardinensis. 

 LOWER J D2 _ ^ M.nilssoni. 

 Ludlow. ^ d ^ ^ Phacops obtusicaudatus. 



fC 4. ,, Cyrtograptus lundgreni. 



w J C 3. ,, C. rigidus. 



Wenlock. -! q 2_ f) Monograptus riccartonensis. 



I C 1. ,, Cyrtograptus murchisoni. 



Below are Yalentian rocks (A and B divisions of the Stockdale 

 Shales). 



The Wenlock Beds are most fully developed in some streams 

 entering the Biver Bawthey from the south. The detailed succession 

 of these is given, and confirmatory sections are described in other 

 parts of the district. 



The Ludlow Beds are found mainly in the northern part of the 

 area, where the geology is simpler. 



A comparison is instituted between these beds and those described 

 in the Welsh Borderland by Miss Elles & Miss Wood (Mrs. 

 Shakespear), and those of Wenlock age in Southern Sweden 

 described by Tullberg. 



