From Eocene to Recent Time 



251 



the pool, had left their impression on the still soft mud. 

 But, with another season, the rains gave to the basin its 

 former aspect, and permitted the same set of phenomena 

 to be reproduced." Further in describing the relation of 

 the amioid fish Cyclunis he again accepts alternating periods 

 of dryness and flooding in connection with the preservation 

 of them. A closely similar set of beds to those of Menat 

 in Auvergne is described by Reuss and Mayer in North 

 Bohemia {188: i). The strata, as exposed in three locali- 

 ties, are purely of freshwater origin, and consist of brown 

 coal, freshwater chalk, grey and reddish sandstones etc. 

 As at Oeningen and other more western localities, the 

 strata are rich in coniferous twigs and cones, in palm leaves 

 and those of dicotyledons. The fauna reveals wings of 

 Coleoptera, millions of Cypris, such freshwater shells as 

 Helix, Bulimus, Acliattna, Planorhis. The fish and reptilian 

 rexnains closely resemble those of Oeningen, Steinheim, 

 Aix-en-Provence, and Menat. They then point out that 

 while, during Miocene time, a large part of Hungary, 

 Galicia, Austria, and eastern Bohemian was covered by 

 sea, the northern part of Bohemia was covered by a large 

 lake in which was deposited the brown coal and other strata. 



