Vol. 70.] FOSSIL FLORA OF THE KENT COALFIELD. 55 



(1549 feet), Mattice Hill (1076 feet), Trapham (1651 feet), 

 Walmestone (1201 feet), and Stodmarsh (1075 feet). Lastly, 

 there are three borings in a more easterly direction, Maydensole 

 (4-2565 feet), Ripple (2287 feet), and Oxney (2705 feet). The 

 fossil plants which I have collected, as the result of a careful 

 examination of the whole of these borings, form the subject of the 

 present paper. 



With regard to previous records from the Kent coalfield, it will 

 suffice to recall the initial determinations made by my friend Prof. 

 Zeiller 1 in 1892 and 1894, and my previous paper 2 in this Journal 

 in 1909. Since then I have recorded 3 two particularly interesting 

 genera, new to Britain, and some of the fossil seeds of the coalfield 

 are discussed and figured in ' A Revision of the Seed Impressions 

 of the British Coal Measures,' which has recently appeared in the 

 ' Annals of Botany.' i 



The question of the palaeobotanical horizons represented in Kent, 

 which it was one of the main objects of this work to consider, may 

 be more appropriately dealt with at the conclusion of the paper. 

 It may, however, suffice to remark here, that, in addition to the 

 Transition Coal Measures previously recorded, evidence has so far 

 been found of the presence of only one other horizon, the Middle 

 Coal Measures, and that there are good reasons for the belief that 

 these two horizons alone are represented in the Kent coalfield. 



I would here also express my indebtedness to the officials of 

 the Companies owning the borings concerned, and particularly to 

 Mr. Arthur Burr and Dr. Malcolm Burr, for their constant courtesy, 

 and for the kind way in which they have always facilitated my 

 work in Kent. 



II. The Baefbestox Boeing. 5 

 (Lat. 51° 12' N., long. 1° 14' E.) 



A boring close to Barfreston Church penetrated 2103 feet into 

 the Coal Measures, and finished in these beds. The flora of the 

 higher 1614 feet indicates that the horizon of these measures is 

 the Transition Series. As regards the lower +489 feet, there is 

 some uncertainty as to the horizon, although these beds probably 

 belong to the Middle Coal Measures. The Transition Coal- 

 Measure flora proved to be rich in species and varied. In all, 

 thirty-four species have been determined from the higher, and eight 

 species from the lower horizon. 



1 Zeiller (1892) & (1894). For full references, see Bibliography, § XV, p. 80. 



- Arber (1909). 3 Arber (1912). 4 Arber (1914). 



5 Through the kindness of Prof. W. Boyd Dawkins, F.R.S., I have been 

 enabled to examine a number of specimens containing plant-remains from the 

 Ropersole boring, at depths varying between 1847 and 2021 feet from the 

 surface. These specimens are in the Manchester Museum. The only species 

 that I could determine, however, were Neuropteris scheuchzeri Hoffm., 

 N. tenuifolia (Schl.), and Cornucorpus acutits (L. & H.) : the horizon of the 

 beds is thus unknown. 



