Field Columbian Museum 



Publication 36. 



Geological Series. Vol. I, No. 6. 



CONTRIBUTIONS TO 



THE PALEONTOLOGY OF THE 



UPPER CRETACEOUS 



SERIES 



BY 



William Newton Logan, A.M. 



Oliver Cummings Farrington, Ph.D. 

 Curator, Department of Geology. 



Chicago, U. S. A. 

 April, 1899. 



