INTRODUCTIONThis list contains dates for Latin America which have mainly been measured during the past few years. The results are grouped into three categories: geologic, archaeologic, and geophysical, and arranged according to the country of provenance, passing roughly from N to S. Most of the geologic samples are connected with palynologic studies. In cases where the influence of man is apparent in the pollen diagrams, this is explicitly mentioned. Descriptions and comments are based on information provided by the collectors or submitters and on the publications referred to under each sample or series. For the archaeologic section reference has also been made to the general works of Meggers and Evans (1963), Jennings and Norbeck (1964), and Willey (1966).Unless otherwise stated, the samples were treated before combustion, in the usual manner with dilute acid, alkali, and acid, respectively. Especially large additive corrections of as much as 240 years are necessary in the case of maize (GrN-4729 and GrN-5396) since the deviating C13/, C12 ratio must be ascribed to physiological rather than ecological reasons. This has been mentioned implicitly by Munnich and Vogel (1958) and Munnich (1961 All dates younger than 550 B.P. have been corrected for secular variations in C14 by means of the correction curves of Stuiver