MaiicJiester Memoirs^ Vol. xlviii. (1903), No. 2. 23 



In other words, a horizon is now recognised, which is 

 intermediate between the true Upper and the Middle 

 Coal Measures. This is known as the Upper Transition 

 Series. The general character of the flora of this horizon 

 is a mixture of Upper and Middle Coal Measure types. 

 This transitional series has now been recognised in several 

 coalfields. The Lower Pennant Grits of South Wales\ 

 the New Rock and Vobster Series in the Somersetshire 

 Coalfield^, and certain beds in the Potteries Coalfield^, 

 belong to the Upper Transition Series. The Ardwick 

 Series is the equivalent of these beds. The true Upper 

 Coal Measures, to which belong the Upper Pennant Series 

 of South Wales, the Radstock and Farrington Series in the 

 Somersetshire Coalfield, and the workable coals of the 

 F"orest of Dean Coalfield, are not represented in the 

 Manchester or the South Lancashire Coalfields. 



The species, which have been described here from 

 Ardwick, and others which have previously been recorded 

 from the Ardwick and Bradford Series, are as follows : — 



Ardwick Series. 



List of Species in the Binney Collection at Cambridge. 



Calamites {Eiicalatnites) ramosus (Art)? 

 Annularia stellata (Schl.) 

 Palceostachya sp. 

 Sphenophyllmn sp. 

 Neuropteris Scheiichzeri, Hoffm. 

 Neuropteris gigantea Sternb. ? 

 Pecopteris Miltoni (Art.) 

 Mariopteris iniiricata (Schl.) ? 

 Lepidodendron lycopodioides Sternb. 



^Kidston ('94), pp. 573—4- 

 ^Kidston ('88). 

 ''Kidston ('97), p. 129. 



