BROWN-COAL AND LIGNITE. 383 



importance for fuel, but very perfect remains of vegetables 

 are dispersed in great abundance through the marly slates 

 and limestone quarries which are worked there, and afford 

 the most perfect history of the vegetation of the Miocene 

 Period, which has yet come within our reach.* 



• I have recently been favoured by Professor Braun of Carlsruhe, with 

 the following important and hitherto unpublished catalogue, and observations 

 on the fossil plants found in the Fresh-water formation of CEningen, which 

 has been already spoken of in our account of fossil fishes. The plants 

 enumerated in this catalogue, were collected during a long series of years 

 by the inmates of a monastery near CEningen, on the dissolution of which 

 they were removed to their present place in the Museum of Carlsruhe. It 

 appears by this catalogue that the plants of CEningen afford examples of 

 thirty.six species belonging to twenty-five genera of the following families. 



This table shows the great preponderance of Dicotyledonous plants in the 

 Flora of CEningen, and affords a standard of comparison with those of tlie 

 Brown-coal of other localities in the Tertiary series. The greater number 

 of the species found here correspond with those in the Brown-coal of the 

 Wetteraw' and vicinity of Bonn. 



Amid this predominance of Doctyledonous vegetables, not a single herba- 

 ceous plant has yet been found excepting some fragments of Ferns and 

 Grasses, and many remains of aquatic plants : all the rest belong to Dico- 

 tyledonous, and Gyranospermous ligneous plants. 



Among these remains are many single leaves, apparently dropped in 



