FOSSIL DICOTYLEDONOUS LEAVES. 201 
__ The red marl-stone associated with lignite in the plastic 
4 day beds at Castle Hill, Newhaven (Geol. S. £. p. 54), 
Lien. 68. ImprRINTS OF DicoTyLEDONOUS LEAVES IN GypsEouS MARL. 
Tertiary. Stradella, near Pavia. 
Fig. 1.—Leaf of Poplar (Populus gre@ca). 
2s Maple (Acer). 
Water-spike (Potumogeton). 
Willow (Salix). 
Chestnut (4sculus). 
3 
4, 
5 
" contains leaves of a similar kind ; a seed-vessel of a coniferous 
tree has also been found in it. 
Some of the most interesting examples of dicotyledonous 
leaves that have come under my notice, are from the Sub- 
_ Apennine tertiary strata, at Stradella, near Pavia. They 
belong to several genera of arborescent, or at least ligneous 
