I08 PEOCEEDCTGS OF THE &EOLOGICAI SOCIETT. 



length. The principal faults mn north and south, with an upthrow to 

 the east, but are crossed by lines of fracture running east and west. 

 In conclusion, the correlation of the strata in the Xorth Wales 

 and Shrewsbury coal-fields, and especially of the coal-seams, with 

 the beds found in other parts of Great Britain, was discussed, and 

 a section was given to show the representation of the different 

 measures in various coal-basins. The Author was disposed to adopt 

 four subdivisions rather than three only, as usually accepted, and 

 pointed out some of the characteristics of each subdivision. 



Discrssio^^. 



Mr. Baterxa^s- remarked that but little attention had hitherto 

 been paid to the interesting Coal-fields described by the Author, to 

 whom thanks were due for the careful sections which he had made 

 of them. Although the yield of these basins was not large when 

 compared with those of the north of England and South Wales, they 

 formed part of one of the largest deep-ljing Carboniferous areas 

 in the country, being the western limit of the great basin under- 

 lying the plain of Cheshire. He thought, however, that the 

 Author's correlation of the seams throughout the whole of the 

 English Coal-field (apart from that of iS'orthumberland and Durham) 

 was somewhat fanciful. That particular seams, say in the TVigan 

 district, could be proved to be the exact equivalents of others in 

 South Wales, and that both were exactly represented in interme- 

 diate basins, such as the Eorest of Wyre, appeared to be exceedingly 

 improbable. 



The following specimens were exhibited : — 



Specimens of Purbeck Ostracoda, exhibited by Prof. T. Eupert 

 Jones, F.E.S., F.G.S., in illustration of his paper. 



Zinc-spinel and willemite, formed in a zinc-retort, exhibited by 

 H. Bauerman, Esq., E.G.S. 



May 27, 1885. 

 Prof. T. G. Bonnet, D.Sc, LL.D, F.K.S., President, in the Chair. 



George Ormond Xekewich, Esq., &2 Lansdowne Koad, dotting 

 HiU, W., was elected a Eellow of the Society. 



The List of Donations to the Library was read. 



The Secretary- announced that six slides of Fossil Cyclostomatous 

 Bryozoa from Muddv Creek, South Australia, illustrating the paper 

 in Q. J. G. S. vol. xi. p. 674, by A. W. Waters, Esq., E.G.S., had 

 been presented to the Museum by J. Bracebridge Wilson, Esq., of 

 Geelong, South Australia. 



