of Geological Periods, 281 



The ffth stage of our series is a continuation of the preceding; 

 the tropical types which we shall indicate in it are derived from 

 the floras of Manoscfue and Bonnieux in Provence, of Monod, 

 Hohe-Rhonen, and Eriz in Switzerland, of Brognon near Dijon, 

 of Bovey-Tracey in Devonshire, &c. 



Ferns : LygodiurUj Sw. — L, Gaudini, Heer. (Monod, Manosque.) 

 L. acutanguhim,l{eerj L.Laharpeiy Heer, L.aa'ostichoideSy 

 Heer. (Monod.) 

 Cycade.^ : Zamitcs, Brong. — Z. epibius, Sap. (Bonnieux.) 

 Palms : Flahellariaj Sternb. — F, latiloba, Heer. (Vevay, Brog- 

 non.) 

 Sabalites, Sap. — S. major, Ung., S. haringiana, Heer. 

 (Switzerland.) 

 Papilionace^ : Pterocarpus, L. — P. Fischeri, Gaud. (Monod.) 

 Brachypterum, Benth. — B, {Micropodium) lignitum, Sap. 



(Manosque.) 

 Campsiandraf Benth. — C. {Pycnolobium) tetraspermaf Sap. 

 (Manosque.) 

 MiMOSE/E : Acacia, Neck. — A. sotzkiana, Ung. (Monod, &c.) 



We must remark here, in the first place, the persistence of 

 certain types which might have been thought to have been long 

 before extinct. The Zamites epihius, collected at Bonnieux by 

 M. E. Arnaud and described by me two years ago, is proved to 

 be perfectly authentic by the finely schistose structure of the 

 lamina, of lacustrine origin, which contains it ; but it is hardly 

 to be distinguished from its predecessor, Zamites Feneonis, 

 Brong., from the Corallian. As regards the Lygodia, which we 

 have previously indicated in the Chalk, and which are frequent 

 in Switzerland, their presence at Manosque at the same epoch 

 is attested by a fine impression ; and even beyond this genus 

 the ferns of that period present a great number of forms of 

 tropical physiognomy, the strict determination of which is pre- 

 vented by the absence or bad state of their fructification. I may 

 cite, as forming part of this category, the Pecopjteris lignitum, Heer 

 [Aspidium lignitum, Gieb.), which occurs in Germany, England 

 (Bovey), Savoy, and Provence (INIanosque), the Pecopteris Lu- 

 cani, Sap., from Brognon, the Lastrea dalmatica, Ett., from 

 Promina and Switzerland, and, finally, the Lastrea stiriaca, 

 which is distributed through a great number of Tertiary locali- 

 ties. All these ferns are evidently analogous to those of the 

 hottest countries of the existing world. 



The Leguminossc also include several well-characterized tro- 

 pical genera. One of the most remarkable that I am acquainted 



