196 Geological Society : — 



{1. Cypridinen-Schiefer. 

 2. Goniatite-limestones and slates. 

 3. Massive Limestones, 

 f 4. Ashprington Yolcanic Series. 

 Middle. < 4. Middle Devonian Limestones. 



[ 5. Eifelian slates and shaly limestone. 

 j (6. Slates and sandstones, generally red. 



\ 7. Slates with hard grits. 



After discussing the relationship of the Lincombe and Warberry 

 beds and the New Cut Homalonotus-beds, the author notes the 

 discovery of Pleurodictyum by Mr. Whidborne in the Railway Cutting 

 at Saltern Cove. He proves the Lower Devonian age of the Cocking- 

 ton beds and their correlation with the Torquay Lower Devonian 

 by the discovery of fossils. He considers it probable, though not 

 certain, that the main mass of Meadfoot beds is below the Lin- 

 combe, Warberry, and Cockington sandstones. 



The distribution of the Middle Devonian Limestones is described. 

 Stringocephalus is found in limestones containing ffliynclionella 

 cuboides. The upper parts of the limestone-masses (East Ogwell, 

 Kingskerswell, Barton, Ilsham, &c.) may be Upper Devonian. The 

 massive limestones may terminate abruptly or pass laterally into 

 shales, and the whole mass of the limestones seems to be replaced 

 by slates between the Yealmpton and Totnes areas. 



The commencement of the phase of volcanic activity which 

 caused the accumulation of the Ashprington series is shown to coin- 

 cide with the latest stage of Eifelian deposition, and the Ashpring- 

 ton series may represent continuous or intermittent vulcanicity up 

 to a late stage in the Upper Devonian. North of Stoke Gabriel a 

 mass of limestone seems to have been formed contemporaneously 

 with the volcanic material on the immediate borders of which it 

 occurs. Elsewhere the limestones are interrupted by local influxes 

 of volcanic material. The occurrence of other local developments 

 of Middle and Upper Devonian volcanic rocks is described. 



The relationship of the Middle and Upper Devonian deposits 

 varies. In some cases Upper Devonian shales may have been 

 deposited against Middle Devonian limestones ; in others there is 

 a continuous development of limestone, the Middle Devonian lime- 

 stones being succeeded by Cuboides-be&s, Goniatite-limestones, and 

 Knollenkalk. The local variations of these are described, and 

 fossil-lists given. The Knollenkalk is shown to pass under Entomis- 

 bearing beds (" Cypridinen-Schiefer "), which are described, though 

 a detailed account of their relationship to the Culm-measures is 

 reserved for a future occasion. 



May 14. — Dr. A. Geikie, E.R.S., President, in the Chair. 



The following communications were read : — 

 1. " The so-called Upper-Lias Clay of Down Cliffs." By S. S. 

 Buckman, Esq., F.G.S. 



The blue clay of Down Cliff, Dorset, which has been referred to 



