280 Geological Society. 



occupying the same stratigraphical position in Glamorgan, and 

 include the ' Upper Rhsetic,' the equivalent of the White Lias 

 proper, and the ' Watchet Beds.' The now obscured magnificent 

 sections, that were temporarily to be seen in the railway-cuttings 

 at Langport and Charlton Mackrell, briefly noticed by Mr. H. 

 B. Woodward, are described in detail (the records being made in 

 company with Mr. E. T. Paris, E.C.S.). Here huge boulder-like 

 masses of rock were noted at the top of the Black Shales, and the 

 White Lias proper, with a well-marked Coral-Bed, totalled 25 feet in 

 thickness. The classic sections of Snake Lane, Dunball (Puriton), 

 Sparkford Hill (Queen Camel), Shepton Mallet, and Milton (Wells), 

 have been re-investigated and brought into line ; and the interesting 

 thin llhsetic deposits in Vallis Vale, at Upper Vobster, and sections 

 in the Radstock district, and on the Nempnett and neighbouring 

 outliers, are described. In addition to the record of many new or 

 imperfectly-known sections, this investigation has also shown that 

 the Microlestes Marls are equivalent to the Sully Beds : that the 

 Wedmore Stone occurs well below the Bone-Bed; that Moore's 

 'Flinty Bed' at Beer Crowcombe is probably on the horizon of the 

 PUurophorus Bed (No. 13) ; that the Upper lihsetic (generally with 

 Cotham Marble or its equivalent) is as persistent as usual, if not 

 quite so thick; that the White Li as proper is of restricted geographical 

 extent ; and that on the Bristol Channel littoral are marls, ' Watchet 

 Beds,' above the White Lias. Around Queen Camel, Moore's 

 6 Insect and Crustacean Beds ' appear to come in at a horizon which 

 lies between the Watchet Beds and the Ostrea Limestone. 



The following classification of the Rhaetic Series is suggested, 

 and the succession of maxima of the characteristic fossils is given 

 in the paper : — 



Thicknesses in 

 Lias. Hettangiait. Ostrea Beds, etc. England. 



C I. Watchet Beds ('Marly Beds"),,, » .. \ . 



. , „r, . -r • ,x f to 7 it. 7 ins. 



ot the White Lias ) ) 



Somer- J II. Langport Beds (White Lias ") Q . „_ ,. 



setian proper) 5 



Rh*tic{ I III. Westbury Beds (< Upper j g ft> g ^ ^ 1Q ffc< 



t_ Rhaetic') ) 



r IV. Lilstock Beds (Black Shales) 1 to (?) 47 ft. 

 Rhj^tian \ V. Sully Beds (Fossiliferous ^ n to 14 ft 



L Grey Marls) 5 



Keupee^ Keuper- ( Tea-green and Grey Marls Ill ft. (max.). 



1 ian I Ked Marls. 

 The sudden lithic and faunal changes in the contiguous divisions 

 are held to be the expression of oscillatory movements and inter- 

 rupted sequential deposition. The fauna of the Rhaetian is 

 decidedly Svvabian in facies, and the general conclusion to be 

 derived from the study of the beds is in entire agreement with 

 Suess's view, that while the dominant movement was one of sub- 

 sidence and not local but extended, it was, nevertheless, ' oscillatory 

 and slow.' 



2. ' Jurassic Plants from the Marske Quarry.' By the Rev. 

 George John Lane, F.G.S. 



