.04 



MEMOIRS 



OF THE 



BOSTON SOCIETY OF NATURAL HISTORY 



VOLUME 5, NUMBER 11. 



FOSSIL FOOTPRINTS OF THE JURA-TRIAS OF NORTH AMERICA. 



By RICHARD SWANN LULL, PH. D. 



BOSTON : 



PUBLISHED BY THE SOCIETY FROM THE 

 GURDON SALTON STALL FUND. 



April, 1904. 



