Bronze medallion with the effigy of Louis Agassiz (1807-1873), Swiss geologist and paleontologist. In 1846, he moved to Boston, Massachusetts, in the United States. He founded, in 1859, the Museum of Comparative Zoology (MCZ), one of the museums of Harvard University, and was its director until his death. In 1865, he came to Brazil, heading the Thayer Expedition that passed through Rio de Janeiro, Minas Gerais and states in the Northeast and the Amazon. He studied fossil fish from the Chapada do Araripe, including the Vinctifer comptoni