Vol.51.] OF THE MID-COTTESWOLDS. 461 



Postscript. 



[A few weeks after this paper was read I was able to satisfy 

 myself that I had found the clue to the mystery of the ragstone- 

 beds of Cleeve Hill, which has been a difficulty for a very long time. 

 As their sequence affects the date of Terebratula Phillipsiana, men- 

 tioned in this paper (p. 457), the following note of the succession 

 may be made : — 



0. Upper Trigonia-grit. 



1. Sandy beds with Terebratula Phillipsiana and T. Buok-~\ , . 



maniana — a bored bed at the top. I nt\ .• i 



2. Massive limestones, with numerous casts of Bourguetia aff. | ,, • , 



striata, Sowerby, and many lamellibrancbs. J 



3. Limestone with Acanthothyris aff. paucispina, Buckm. & Walker, pro- 



bably equivalent to the Witchellia-grit of Cold Comfort ; Terebratula 

 Wrighti being 14 feet from the base (see p. 417). 



4. Notgrove Freestone. 



5. Gryphite-grit. 



6. Beds with T. BucJcmani partly exposed. 



7. Lower Trigonia-grit, partly exposed. 



8. Blue clay resting on yellow and white siliceous sands = Harford Sands. 



Nos. 1 to 8 are the 'intervening beds.' The interest lies in 

 Nos. 1 & 2, which are superior to the WitcJiellia-grit, and are not 

 matched by any strata described in this paper. They help to fill the 

 gap between the Witchellia and Upper Trigonia-grits (see p. 422), 

 and yet the latter is still a non-sequential deposit. 



In the Table of Brachiopoda, No. VII., pp. 440-443, the following 

 alteration has been made, as suggested by the above sequence of 

 strata : namely, the placing of the Phillipsiana-beds with the fossils 

 they vield, above the Witchellia-grit, suggesting that T. Phillipsiana 

 and T. BucJcmaniana, sensu stricto, probably lived during the iSauzei 

 hemera as contemporaries of the Dorset and Continental T. ventri- 

 cosa. This and the detailed stratigraphical work on Cleeve Hill 

 will receive future attention. 



One other point may be noticed. In Oolite rocks the matrix 

 differs so much and so frequently in a slight vertical range that 

 spoil-heap specimens and fossils collected many years ago, without 

 exact indication of horizon, may often be of considerable service. 

 Again, in shallow quarries one or two beds may be fossiliferous, the 

 rest unfossiliferous, giving presumptive evidence of horizon for a 

 specimen from the locality. These remarks have reference not only 

 to specimens alluded to in this paper, but also to the fact that 

 Wright obtained several ammonites from Cleeve Hill ; and if these 

 could be traced and inspected their horizons might not only be 

 ascertained from lithological characters, but they would give 

 valuable evidence for the exact correlation of the Cleeve Hill beds 

 with Dorset.— April 15th, 1895.] 



