KIDSTON: YORKSHIRE CARBONIFEROUS FLORA. 15 



In his various memoirs, Prof. Williamson figures and 

 describes many Yorkshire specimens shewing their internal 

 organization. Messrs. Cash & Hick have also contributed 

 papers on the structure of some of the Yorkshire Coal 

 Plants. 



These papers will be treated of move fully in that part of 

 the report dealing with sucli specimens. 



Yorkshire has long been famous for the excellent 

 specimens of Stiginaria which have been discovered during 

 quarrying and other operations. 



One such discovery is described by Dr. H. C. Sorby in a 

 paper " On the Remains of a Fossil Forest in the Coal 

 Measures at Wadsley, near Sheffield,"' i and another account 

 of a similar but better known discovery was that made at 

 the quarries of Messrs. John Murgatroyd &: .Sons at Clayton 

 near Biadford, in July, 1886, which has been described, 

 along with other discoveries of a simiUir nature, by Mr. S. 

 A. Adamson, F.G.S., in a paper "On Recent Discoveries 

 of Carboniferous Vegetation in Yorkshire."! 



The finest of the Clayton Stigjuarke has been figured by 

 Prof Williamson in his " Monograph on the Morphology 

 and Histology of Stiginaria Jicoides."* This specimen is 

 now in Owens College, Manchester. 



In 1877, the North of England Institute of Mining and 

 Mechanical Engineers published a volume of "Illustrations 

 of Fossil Plants : being an Autotype reproduction of 

 selected drawings, prepared under the supervision of the 

 late Dr. Lindley and Mr. W. Hutton, between the years of 

 1835 and 1840, and now for the first time published." 



This work contains only one Yorkshire record : — 

 Asterophyllites sp. PI. iv. Low Moor. Perhaps this is the 



Asterophyllites roehli Stur. 



{ Quart. Journ. Oeol. Soc, 1871;, p. 458. 



t See also Urit. Assoc. Report, 1S86, p. 6z8, and Quart. Journ. Gtol. Soc, vol. xliv, 

 p. 375; '888. 



Pala:ont. Soc, 1887. PI. xv. 



