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Working Camp #1. 1 S. end of Lago Coli-Huapi, 15 Kms. south-west of Casa Ramos. Barranca extending with good exposures from South of camp to classic locality 'Colhu?-Huapi' for Notostylops, Astraponotus, Pyro- therium, + Colpodon beds. Oct. 12, 1930, to Dec. 3, 1930.