PREFACE. 



THE first part of this Catalogue of the Wealden Plants 

 contained figures and descriptions of the Algae, Characese, 

 Equisetinae, and Filicinae ; the present volume is devoted 

 to the Cycadese and the Coniferse. 



In the Author's conclusions he gives a summary 

 (pp. 233241) of the Wealden flora comprised in these pages, 

 from which it appears that the Thallophyta are repre- 

 sented by 2 sp. ; the Charophyta by 1 sp. ; the Bryophyta 

 by 1 sp. ; the Equisetinse by 3 sp. ; the Filicinse by 23 sp. ; 

 the Cycadese by 24 sp. ; the Coniferae by 17 sp. ; uncertain 

 forms, 5 species : total, 76 species. 



Mr. Seward considers that " the general characters of the 

 vegetation certainly seem to point to a tropical climate, 

 and there can be little doubt that the temperature was 

 considerably higher than the Wealden districts enjoy at the 

 present day' 1 (p. 239). He further adds that, "Looking 

 at the Wealden plants collectively, we notice a very striking 

 agreement with the flora of the underlying Jurassic strata, 



