Paper by Adolpho Lutz completed on April 15, 1925 and published in 1926 in Memórias do Instituto Oswaldo Cruz (v.19, fasc. 2, p.139-57 in Portuguese and p.159-74 in English); eight engraved plates numbered 30 to 37. The English title is “Observations on Brazilian Batrachians. Part 1 —The genus Leptodactylus." [E.N.]