4 INTKODUCTIOir. 



Glossopteris Phillipsii = Sagenopteris Phillipsi (Brongn.). 



Tmniopteris vittata = T. viftata, Brongn. 



Peeopteris dmticulata = Cladophlebis denticulata (Brongn.). 



P. Phillipsi = ? G. denticulata. 



P. tvhitbiensis \ 



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



P. Williamsonis J 



P. Murrayana = Goniopteris hymenophyUoidea (Brongn.) and Sphencpteris 



Murrayana (Brongn.). 

 P. athyroides = ? Goniopteris hymenophyUoidea (Brongn.) or Sphenopteria 



Murrayana (Brongn.). 



Phlebopterispolypodioidea '. ^ Zaeeopteria polypodioidea (Brongn.). 



P. propinqua ) 



P. Schouwii = Zaccopteris, sp. 



P. undans = Cladophlebia denticulata (Brongn.). 



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



Phillips' Illustrations of the Geology of Yorhshire was puMisbed 

 in 1829, dedicated by an " affectionate nepiew 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 OoHte formation," the term Oolite 

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

 are classified by Phillips as follows : — 



(Cortibrash limestone. 

 Upper sandstone, shale and coal, with plants. 

 Impure limestone. 

 Lower sandstone, shale and coal, with plants. 

 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.'' This mistake was 

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

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



^ John WaUamson is usually credited with the discovery of the famous 

 Gristhorpe plant-bed. In a letter written to Lindley in 1832, WiUiara Beau 

 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 PhUKps, (29) p. 33. 



* Williamson (37). 



