BUIvlvBTINS 



OF 



AMERICAN PAlvKONTOI.OGY 

 Vol. 9 



No. 39 



The Miocene of Northern Costa Rica 



With Notes On Its General Stratigrapiiic Relations 



BY 



A. A. OLSSON 



Part I 



{Pp. 1-168, April 21) 



Harris Co. 

 Cornell University, Ithaca, N. Y 

 U. S. A. 



