Paper by Adolpho Lutz published on May 6, 1929: “Taxonomia e biologia do genero Cyclorhamphus." Reprinted in Memórias do Instituto Oswaldo Cruz (v.22, fasc. 1, p.5-16 in Portuguese and p.17-25 in English, in the latter case under the title “Taxonomy and Biology of the genus Cyclorhamphus”); the paper includes prints numbered 1 to 5. The previous year, Lutz had published a communication on the same topic for the Brazilian Society of Biology, which has also been republished in the present book of his Complete Works: “Biologie et métamorphose des Batraciens du genre Cyclorhamphus,” in Comptes Rendus Hebdomadaires des Séances et Mémoires de la Société de Biologie et de ses Filiales (Paris: Masson et Cie, Éditeurs, Libraires de L'Academie de Médecine, v.98, p.640). [E.N.]