XvVill INTRODUCTION. 
FRANCE. 
Three species of Wealden plants are mentioned by Brongniart 
from Beauvais ?:— 
Lonchopteris Mantelli, Brong.= Weichselia Mantelli (Brong.). 
Pachypteris gracilis, Brong. =Sphenopteris Fittoni, sp. nov. 
Brachyphyllum Gravesii, Brong. 
De Lapparent, in his ‘“ Traité de Geologie,”? refers to the 
development of fresh-water infra- Cretaceous rocks south of 
Beauvais in the Pays de Bray, and notes the occurrence of the 
common English fossil Werchselia Mantelli (Brong.).’ 
GERMANY. 
Dunker’s well-known Monograph,‘ which appeared in 1846, 
deals exhaustively with the fresh-water formation of Northern 
Germany, previously correlated by Hoffman with the English 
Wealden. These rocks are comprised in a stretch of country 
between Helmstidt and Bentheim, and are usually subdivided 
into two members, the lower consisting of sandstones, etc., and 
the upper of clay beds; to the former the term Wealden or 
Deister Sandstone (= Hastings Sands of English geologists) is 
applied, and to the latter Weald Clay. The flora of these North 
German beds is obviously of the same facies as the Wealden 
of England, and no doubt of the same geological age. It should 
be noticed, however, that in Pavlow and Lamplugh’s Monograph,* 
to which reference has already been made, it is stated that the 
beds in Germany spoken of as Wealden have little in common with 
the typical Wealden of England. 
The next contribution to which attention needs to be called is 
one from Ettingshausen in 1852 on the doubtful fossil Palgoxryris, 
Brong., which is described at some length from the Deister beds 
under the name of Paleobromelia Jugleri, Ett.6 The mention of 
Paleoxyris in this introductory sketch is not intended to imply 
1 Tableau, p. 107. 
* 1885, p. 1042; see also Passy, Descript. Géol. Seine-inf. p. 194. 
’ Saporta has recently recorded another species from the Lower Wealden of 
Boulogne, Sphenopteris Delgadoi, ? Sap.=S. Fittoni, sp. nov. Rev. gen. bot. 
vol. y. p. 365, 1893, pl. iv. fig. 5. 4 Wealdenbildung. 5 p. 189. 
6 Abh. k.-k. geol. Reichs. vol. i. 1852, Abth. iii. p. 1. 
