576 



MR ROBERT KIDSTON ON 



General Remarks on Tables IV. and V. 



In my paper " On the Fossil Flora of the Radstock Series of the Somerset and 

 Bristol Coal Field (Upper Coal Measures)," * I gave in an Appendix the fossil plants 

 observed in the Farrington Series, the Pennant Rock, the New Hock Series, and the 

 Vobster Series. Of these the Farrington Series belongs to the Upper Coal Measures, 

 but of the other three series I expressed no opinion on their relative age when studied 

 as a part of the Coal Measures of Britain, deeming it safer to leave that an open question, 

 until I had more fully examined the fossil plants of the South Wales Coal Field, and 

 those of the Middle Coal Measures generally. 



For the last few years my time has been largely devoted to the study of the plants 

 of the Middle Coal Measures, and I am thus in a better position to consider the relative 

 horizon of the New Rock Series and the Vobster Series of the Somerset Coal Field. 

 The Pennant Rocks of the Somerset Coal Field have yielded so few fossil plants, their 

 probable horizon can only be learnt from their relation to the Farrington Series, under 

 which they lie, and the New Rock Series, on which they rest. 



The two following tables give the fossils of the New Rock Series (Table IV.), and of 

 the Vobster Series (Table V.), of the Somerset Coal Field. 



Table IV. 



Fossil Plants of the New Rock Series, Somerset Coal Field, — compared with 

 those of the South Wales Coal Field. 



CS 



o — 



A— 



S3 g 



o 



o 



DQ 



05 



<J g 

 o 





o . 



O a 



tf-g 



a, =3 



Pi 



° 5 



P-, 



White Ash 

 Series. 



X 



X 



X 



Catamites Suckowii, Bgt., 



X 







X 



X 



X 

 X 



X 

 X 



X 



X 

 X 



Alethopteris Serlii, Bgt., . 

 Sphenopteris trifoliolata, Artis, sp., 

 Neuropteris macrqphytta, Bgt., 

 Mariopteris muricata, Schl., sp., . 







X 

 X 

 X 

 X 



X 

 X 



X 



X 

 X 



X 







Peeopteris arboreseens, Schl., sp., . 







X 









X 



X 



X 



,, Miltoni, Artis, sp., 







X 



X 



X 



X 



X 

 X 

 X 



X 

 X 



X 

 X 



Sphenophyllum emarginatum, Bgt., 

 Sigiltaria camjrfotoenia, Wood, sp., 

 „ tessellata, Bgt., 







X 

 X 

 X 



X 

 X 

 X 



X 

 X 



X 

 X 





X 



X 



,, seutellata, Bgt., 







X 





X 







X 

 X 





,, elonijata,Bgt. (S. rur/osa,~Kidst.,notBgt.), 

 „ tenuis, Achep. ( — S. ScMotheimii, Kid- 

 ston, not Bgt.), 



X 

 X 





X 





X 

 X 



X 

 X 



X 

 X 



Stujmaria firoi les, Stbg., sp., 



Cordaites, sp., ..... 



X 

 X 



X 



X 



X 



* Trans. Roy. Soc. Edin., vol. xxxiii. part ii. pp. 335-417. 



