122 Scientific Intelligence. 
{p. 29) regarding the association (established by comparison of conside- 
able lists of species from various localities), of the fossils of the different 
stages of the lias in a single bed. nalogous cases are frequently q 
with at different geological horizons, showing that the causes which have 
limited the vertical range of certain animals are so far local, that unt 
Ww 
oo; 
sum and a yellow altered limestone (dolomite?) also occur in this | pre 
In both the upper and lower divisions sandstones and shales | 
coal plants and layers of anthracite, the latter sometimes ¢h! 
graphite, while the associated calcareous shales contain in various 
ties, and at different horizons, belemnites and ammonites of liassi¢ 4 
