Description of a remarkable fossil Echinoderm. 225 
Art. XXIUL—Description of a remarkable fossil Eichinoderm, 
from the Limestone Formation of St. Louis, Missouri; by 
» JG. Norwoop, M. D., and D, D. Owen, M. D. | 
* “In the winter of 1844-5, during a visit to St. Louis, our search 
__after organic remains in that vicinity, was rewarded by the dis- 
covery of a slab containing three specimens of a magnificent 
fossil belonging to the class Radiata, one of which is here repre- 
agi ciate - 
ean 
Teg 
Bae 
Melonites multipora. 
A minute inspection of the specimens, induces us to believe 
that they are gigantic Echinoderms, closely allied to the Echini- 
ins ; especially to the Echinus. It is true that in some parts of 
their anatomy, they differ from Goldfuss’s description of that di- 
ae) tae 
‘ 
