In 1955 Mr. H. de Souza Lopes (Instituto “Oswaldo Cruz”, Rio de Janeiro, Brazil) sent me a small alcohol collection of chitons which were dredged off the Brazilian coast. An additional sample, qualified as “poor” by its sender, contained 45 dried and curled up specimens of Ischnochiton of which 44 proved to be I. striolatus (Gray, 1828). One specimen could not be identified as it differs from all living species of Ischnochiton as far as I was able to trace. I take pleasure in naming this new species after its collector.