4 INTEODTJCTIOK. 



Glossopteris Phillipsii = Sagenopteris Phillipsi (Brongn.). 



Taniopteris vittata = T. vittata, Brongn. 



Pecopteris denticulata = Cladophlebis denticulata (Brongn.). 



P. Phillipsi = ? C. denticulata. 



P. whitbiensis \ 



P. tenuis > = Todites Williamsoni (Brongn.). 



P. Williamsonis / 



P. Murrayana = Coniopteris hymenophylloides (Brongn.) and Splienopterit 



Murrayana (Brongn.). 

 P. athyr aides = ? Coniopteris hymenophylloides (Brongn.) or Sphenopterit 



Murrayana (Brongn.). 



Phlebovteris polyvodioides i T . . , ,. ., /T( N 



> = Laccoptens polypodioides (Brongn.). 

 P. propmqua ) 



P. Schouwii = Laccopteris, sp. 



P. undans = Cladophlebis denticulata (Brongn.). 



P. Phillipsii = Dictyophyllum rugosum, L. & H. 



Phillips' Illustrations of the Geology of Yorkshire was published 

 in 1829, dedicated by an " affectionate nephew and grateful pupil " 

 to William Smith. Phillips' book marked an important advance 

 on that of Young & Bird, and placed the geology of East 

 Yorkshire on a sound scientific basis ; he included the plant- 

 bearing strata in the "Bath Oolite formation," the term Oolite 

 having been first applied to these rocks by Smith. The strata 

 are classified by Phillips as follows: 



r Cornbrash limestone. 



I Upper sandstone, shale and coal, with plants. 

 BATH OOLITE -[ Impure limestone. 



I Lower sandstone, shale and coal, with plants. 

 V Ferruginous beds Dogger Series. 



In the first edition of Phillips' work the respective positions of 

 the grey limestone and millepore bed are confused, so that the 

 Gristhorpe plant - bed/ which is now included in the middle 

 estuarine series, was placed in the upper division. 2 This mistake was 

 first pointed out by the late Professor Williamson, 3 and corrected 

 in the later edition of Phillips' book. Phillips speaks of the fossil 



1 John "Williamson is usually credited with the discovery of the famous 

 Gristhorpe plant-bed. In a letter written to Lindley in 1832, William Bean 

 asserts that he was "the first discoverer" of this bed. (I am indebted to 

 Professor Lebour for an opportunity of reading Bean's letter.) 



2 Phillips, (29) p. 33. 



3 Williamson (37). 



