488 F. B. Meek—Fossils of the Lilinois Geological Report. 
fossils of the upper member of the Lower Carboniferous lime- 
Agassizocrinus, figured on pl. xxi, from the Chester, are repre- 
sented by a similar form from the Coal-measures, as shown by 
__ the nature of its auricles, but more especially the apparent pris- 
matic structure of the shell, are all characters pointing to close 
