off Argentina. He also participated in two research trips to investigate the natural resources along the Patagonian coastline.

Lahille subsequently became head of the Fish and Game Department within the Argentine Ministry of Agriculture, where he became involved in new fields of biological research. In Argentina, he published over 300 scientific texts in a very broad field. In May 1910 he was appointed professor of zoology at the Faculty of Agriculture and Veterinary Medicine of the University of Buenos Aires.