Vol. 68.] IN THE NOETH-WEST OF ENGLAND. 585 



District dome, as suggested by Dr. Marr. He (the speaker) thought 

 that the evidence x^ointed to the upper zones having successively 

 overlapped the lower, and that later movements had brought the 

 portion nearest the Dent Fault within the range of denuding 

 influences to a greater extent than the portion towards the north- 

 west, so that the lowest beds were exposed near Ravenstonedale. 



The suggestion that the Pinskey-Gill Beds might be of Devonian 

 age added to the difficulty of interpreting the geological history of 

 the area. Rocks of Tournaisian age were present; the red con- 

 glomerate could best be correlated with the Upper Old Red of 

 Scotland, and yet' Devonian rocks were suggested in Pinskey Gill. 

 It would certainly be most useful if the exact position of the red 

 conglomerate, below the bridge of Pinskey Gill, in the sequence 

 could be determined. 



Dr. IvoE Thomas considered that the correlation ofi]iej)inske7/ensis 

 beds with the Hamilton Group of iJs'orth America, as suggested by 

 one of the previous speakers, was very unsafe. The fossils hitherto 

 found in the former were insufficient to warrant even au attribution 

 of Devonian age. The correlation of the Cleistopora Beds with the 

 Chemung Group by the same speaker was also somewhat startling, 

 since there appeared to be no justification for it whatever on 

 palaeontological grounds. 



The palaeontology of the district under discussion was exceptionally 

 interesting. Several of the characteristic fossils, such as C'amaro- 

 toechia jproava, Seminula grer/aria, Productus glohosKS, etc., Avere so 

 far unknown in the South-Western Province ; while the occurrence 

 of forms such as Vaugliania cleistoporoides and other interesting 

 corals afforded ample opportunity for important researches. 



Mr. E. E. L. Dixon congratulated the Author, and was in 

 complete accord with the conclusions, outlined in the abstract, 

 as to the age of the dolomitization and silicification, and the 

 conditions of deposition, that was, in lagoons, of the Solenopora Beds 

 and the associated compact (amorphous-looking) limestones and 

 dolomites. But, although the Author had succeeded in establishing 

 a faunal succession for the iS'orth-West of England, and did not 

 insist on the suggested correlation with the South-Western Province, 

 the speaker asked whether the following alternative correlation of 

 the beds referred by the Author to yC^ had been considered. 



The Sub-zone C^, both in the South-Western Province and else- 

 where (as, for instance, parts of Belgium), commenced with a peculiar 

 shallow-water phase similar to the lagoon-deposits forming the 

 Solenopora Sub-zone of the North-Western Province; at Hush (Co. 

 Dublin) heavy conglomerates in C^ also pointed to shallow-water 

 conditions. Shallow water, therefore, was widespread in C., times, 

 and might well have extended to the jSTorth-Western Province. 

 Further, a yC^ fauna such as that on which the Author relied in 

 correlating the hsiSSil Athyris-glabristria Zone of the North- Western 

 Province with yC^ of the South-Western Province, had been found 

 by Dr. Vaughan to continue in parts of the latter province into the 

 lower part of C^,in which sub-zone therefore, although it was mingled 



