Fig. 3 — Trade relations suggested by archaeological finds of Mollusca in the lowland Maya area. B, Barton Ramie; 

 C, Chichen Itza; Cn, Copan; D, Dzibilchaltun; H, Holmul; I, Isia Cancun; M, Mayapan; P, Palenque; S, San Jose; 

 T, Tikal; U, Uaxactun. 



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