PROCEEDINGS AM. PHILOS. SOC. 



VOL. XXXV, No. 153, PLATE XXX. 



r-^^x -x^i v:' V^°'-"^-'-^ 



THE PtPPEH-HEAHST EXPEDITION. 



THE ANCIENT SHELL SETTLEMENT 



KEY MARCO 



Topographic Map of Key Marco, showing Sea- wall, Water-courts, Canals, Cenotes or 

 Round Reservoirs, Garden-terraces and Central Mounds. 



