Geological Society. 171 



Fig.^. J/rffrofanais Orsfidi, Kroycr. Clieliped, cJ, outer face. After 



K .Miill.T. 

 Fi(/. 4. JJuri/dice rotumlirauda, sp. n. Antennules and antennae. 

 Ft)/. r>. „ „ First l.'fr. 



Fii/. (i. ,, „ Seventli h'pr. 



Fiff. 7. ,, ,, Telson and uropods. 



ritUCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



April oth, 1005.— J. E. Miirr, 8c. 1)., F.H.S., 

 i'residejit, in the Chair. 



The following communication was read : — 



'On the Divi^ions and Correlation of the Upper Portion of 

 the Coal-Alcasurcs, with special reference to their Development 

 in the Midland Counties of England.' By llobert Kidston, 

 F.K.fS. L. & E., F.G.S. 



The following classidcation of the Coal-Measures is proposed by 

 the Author : — 



Proposed Nanus. Names previously used. 



4. Radstockian Series = Upper Coal-ileasures. 

 y. SiafTordian Series = Transition-Series. 

 2. Westphalian Series = Middle Coal-Measiireg. 

 1. Lanarkiaii Series = Lower Coal-Measures (including the Mill- 

 stone-Grit). 



The Staffordian Series includes the I31ackl)and Group beginning 

 with the Biissey-Mine Ironstone, the Etruria-Marl Group, nearly 

 barren of plant-remains, and the Newcastle-under-Lyme Group. 

 The Kadstockian Scries includes the Keele Group and various beds 

 in the Midland Coalfields hitherto referred to the Permian System. 

 A classified table is given of all the plants known from the two 

 upper Series in the Potteries Coalfield, and a list of those observed 

 in the Newstead boring, Trentham. The plant-yielding beds in 

 the shaft of tlie Ilamstead Colliery, near Birmingham, between the 

 depths of 'IV.i and 411 yards from the surface, are undoubtedly 

 referal'le to the Kadstockian Series and to the Keele Group of the 

 Potteries Coalfield ; and the beds without plants, from 200 yards 

 downward, belong to the same group. A bed at 440 yards is 

 referable to the Newcastle Group. A list of these plants is given. 

 These two Series are recognizable in Denbighshire ; and the 



