24^ DESCRIPTION OF THE MUSEUM. 



In this hall we also see several series of rocks, 

 designed to illustrate the geology of different 

 parts of the french territory. They are placed 

 here for a time only, as they Avill he arranged in 

 the third hall as soon as the Museum is possessed 

 of a sufficient number of fossil vegetables or in- 

 vertebrated animals to fill the cases which are 

 intended for them. 



The fossil vegetables are placed in the cases to 

 the left and opposite to the entrance : they are 

 arranged according to the order of the forma- 

 tions to which they belong, and the age of which 

 they characterize. Although their assemblage in 

 this point of view is recent, we already remark 

 some interesting specimens, among which we 

 must be content to notice : 



i st. A series of the larger herbaceous plants, 

 exclusively found in beds of sandstone and coarse 

 slate accompanying coal. 



2d. A large trunk of dicotyledonous wood, 

 which has been changed into silex after having 

 been bored full of holes by ines: it comes from 

 Maestricht. 



3d. A large plate of quartzose sandstone covered 

 with various impressions of leaves : it was found 

 near Le Mans, by M. Menard de la Groye, who 

 presented it to the Museum. 



4th. An enormous trunk of palm-tree, easily 



