SUPPLEMENT— GEOLOGICAL DETAILS. ccix 



Somerset : Bath . . . The bed below the Midford Sands. 



Ilminster district . . . Clay and clay stones of upper part of Upper 



Lias. 



Dundry .... Blue ironshot bed. 

 Dorset : Down Cliffs . . Upper layer of Junction bed, often missing. 



Yorkshire: Blea Wyke . Striatulus shales. 



Variabilis . Gloucestershire : Coaley Wood, The upper part of the Cotteswold Sands. 

 Frocester, Nibley, etc. 

 Chalford . . . . " Upper Lias," blue sandy clay of the Water- 



works. 

 Somerset : Ilminster district . Clay and clay stones of " Upper Lias." 



Yorkshire . . . . ? Nodular shale above Alum shales. 



Lilli . . Gloucestershire : Coaley Wood, The lower part of the Cotteswold Sands. 



Frocester, etc. 

 Nailsworth . . .A hard yellow, often blue sandstone. 



Somerset : Ilminster district . Clay and clay stones, not far below Yeovil 



Sands. 

 Northamptonshire : Moulton . Upper Leda ovum beds. 



The following general terms, which are also in use, and have sometimes been 

 quoted in this work, may deserve explanation. 



Upper Ragstones . Gloucestershire : Cotteswolds ; Clypeus and Upper Trigo?iia-grits. 

 Middle Ragstones . ,, ,, PhiUipsiana to Witcliellia beds. 



Lower Ragstones . „ „ Gryphite to Lower Trigonia-grits. 



Upper beds . .~) C Strata of hemerse Garantianx to fuscee, in 



Parkinsoni-beds . j "£ which Parlcinsonia is dominant. 



Lower beds . . ,, „ . . Generally strata of hemerse Murchisonse 



and Bradforclensis. 



Such terms as Cephalopod Bed, Fossil Bed, Freestone, Building Stone, Road 

 stone, Sands, denote very different horizons at different localities. They must be 

 interpreted accordingly, and the foregoing table will be a guide in this respect. 



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