1012 DR R. KIDSTON. MR T. C. CANTRILL. AND MR E. E. L. DIXON. 



5. The flora of the Sulphur Coal Series of Mamble (and, inferentialfy, that of the 



Highley region) is a Transition [i.e. Staftbrdian] flora (op. cit., pp. 408-10). 



6. The Sulphur Coal Series is unconformable to the Sweet Coal Series in the 



Highley region (op. cit., pp. 374, 423, 431). 



7. The Sweet Coal Series of Wyre Forest is the equivalent of the Productive 



Series of South Staffordshire and Warwickshire (op. cit., p. 428). 



8. The Sulphur Coal Series of Wyre Forest belongs to the same horizon as the 



Red Clay Group (=Etruria Marls) of South Staffordshire, and may be the 

 actual representative of that very series (op. cit., p. 429). Dr Arber is not 

 satisfied that the Halesowen Sandstones are present in the Wyre Forest 

 Coal Field (op. cit., p. 429). 



9. The Claverley section resembles that of Wyre Forest rather than that of 



South Staffordshire (op. cit., p. 429). 



10. Dr Arber suggests (op. cit., p. 430) that the coals met with in the Claverley 



boring are probably the same seams as were found in the lower part of the 

 Shatterford pit, " at the base of the Middle Coal Measures," and that the 

 workable coals of Highley lie near the top of the Middle Measures and are 

 perhaps equivalent to the Upper Coal Series of Shatterford. 



11. The Coalbrookdale-Wyre Forest area consists of four distinct and isolated 



Coal Fields (op. cit., pp. 423, 432), plus a fifth (?) at Claverley (p. 431) and 

 a sixth (?) at the Clee Hills (p. 436). 



The four distinct and isolated Coal Fields postulated by Dr Arber are 

 (l) the Lower Series of Coalbrookdale ; (2) the Sweet Coal Series of 

 Highley, the Dowles Valley, and Shatterford ; (3) the Upper Series of 

 Coalbrookdale and the Sulphur Coal Series of the Highley region ; (4) the 

 Sulphur Coal Series of the Mamble region (pp. 432-3). Of these the first 

 and second are of Middle Coal Measure age ; the third and fourth are of 

 Transition age (pp. 432-3). The first, the second, and the measures of the 

 Titterstone Clee Hill were deposited in three essentially local hollows of 

 the old Palaeozoic floor, which were presumably never connected with one 

 another (p. 436). Folding, elevation, and denudation ensued, and in irregular 

 hollows of the surface so produced, Dr Arber's third and fourth Coal Fields 

 were laid down, unconformably to the beds below. The section at Claverley, 

 not being closely comparable (according to Dr Arber) with either Wyre 

 Forest or South Staffordshire, may need a separate Coal Field to itself 

 (p. 431). 



With respect to these conclusions and deductions arrived at by Dr Arber, the 

 following remarks may be made : — 



1 . There is much to support the view that red clays and espley rocks are present 

 throughout the whole series of the Wyre Forest Coal Measures, from the 



