Field Columbian Museum 



Publication 78. 

 Geological Series. Vol. II, No. 3. 



ON THE 



OSTEOLOGY OF NYCTOSAURUS 



(NYCTODACTYLUS), 



WITH NOTES ON 



AMERICAN PTEROSAURS. 



BY 



Samuel W. Williston, M.D., Ph.D. 



Associate Curator, Division of Paleontology 



Professor of Paleontology, University of Chicago. 



Oliver Cummings Farrington, Ph.D. 

 Curator of Geology. 



Chicago, U. S. A. 

 June 1, 1903. 



