Xv INTRODUCTION. 



reticulata as Lonchopteris Mantelli y Brong. In addition to these 

 changes in nomenclature some additional species are recorded: 

 Cycadites Brongniarti, Mant., Sphenopteris Sillimani, Mant.=? Ony- 

 chiopsis Mantelli (Brong.), and S. Phillipsii=.Ruffordia Gopperti 

 (Dunk.), also Lycopodites ?, Calamites, and Uquisetum Lyelli, Mant. 

 The same author furnishes a list of Wealden plants in a 

 communication to the Geological Society entitled " A tabular 

 arrangement of the organic remains of the County of Sussex"; 1 

 but in this list there are no species added to those already men- 

 tioned. Three years later Fitton's important paper was published : 

 4 ' Observations on some of the Strata between the Chalk and the 

 Oxford Oolite in the South-East of England." 2 Under the heading 

 Wealden, he includes Weald Clay, Hastings Sands, and Purbeck. 

 New facts are brought forward with regard to the characteristic 

 and problematical fossil Endogenites erosa, S. and W. = Tempskya 

 Schimperi, Corda, and a new species of Sphenopteris^ S. gracilis, 

 Fitton 3 = Sphenopteris Fittoni, sp. nov., is figured and briefly 

 described ; the occurrence of a Coniferous cone is also noted. 

 "Without attempting to follow each step in the progress of our 

 knowledge of Wealden floras, we may pass at once to a more 

 recent publication and notice what species are recorded. In 

 Topley's Memoir, previously referred to, the following list of 

 plants occurs 4 : 



Araucarites (Zamiostrobus} Pipping - 



fordensis, Ung. 

 Carpolithes Mantelli, Brong. = ? Equi- 



setites Burchardti, Dunk. 

 Clathraria Lyelli, S. and W. 5 

 Endogenites erosa, S. and W. 5 = Temp- 



skya Schimperi, Corda. 

 Equisetites (Equisetum) Lyellii, Mant. 

 Lonchopteris Mantelli, Brong. = 



Weichselia Mantelli (Brong.). 

 Pterophyllum (Cycadites) Brongniarti, 



Mant. 



Sphenopteris gracilis, Fitton = Spheno- 

 pteris Fittoni, sp. nov. 



S. Mantelli, Brong. = Onychiopsis 

 Mantelli (Brong.). 



8. Phillipsii, Mant. =Ruffordia Gop- 

 perti (Dunk.). 



S. Sillimani, Mant. = ? Onychiopsis 

 Mantelli (Brong.). 



Thuytes (Cupressites) Kurrianus, 

 Dunk. 



Zamiostrobus (Zamia] crassus, Lind. 



1 Trans. Geol. Soc. ser. ii. vol. iii. 1835, p. 201. 



2 Ibid. vol. iv. 1836, p. 103. 



3 p. 181, figs. 1 and 2, and Appendix A. p. 349. 



4 Weald, p. 409. 



5 I have substituted Stokes and Webb for Mantell as given by Topley as the 

 authors of the species. 



