SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE. 



172 



PALEONTOLOGY 



UPPER MISSOURI 



A EEPORT UPON COLLECTIONS MADE PRINCIPALLY BY THE EXPEDITIONS UNDER 

 COMMAND OP LIEUT. G. K. WARREN, U. S. TOP. ENGRS., IN 1855 AND 1856. 



INYEETEBHATES. 



BY 



E. B. MEEK AND F. Y. HAYDEN, M.D. 



PART I. 



ACCEPTED FOR PUBLICATION, MAT, 1864. 



