ENUMERATION OF FOSSILS 



COLLECTED IN THK 



NIAGARA LIMESTONE AT CHICAGO, ILLINOIS; 



WITH DESCRIPTIONS OF SEVERAL NEW SPECIES. 



BY PROF. ALEXANDER WINCHELL AND PROF. OLIVER MARCY. 



WITH TWO LITHOGRAPHIC PLATES. 



[FROM THE MEMOIRS READ BEFORE THE HOSTON SOCIETY OF NATURAL HISTORY, VOL. I. NO. I.] 



CAMBRIDGE: 



PRINTED AT THE RIVERSIDE PRESS. 

 DECEMBER, 1865. 



