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After Baker left Cuba, León corresponded extensively with Nathaniel Lord Britton at the New York Botanical Garden, grass specialists A. S. Hitchcock and Mary Agnes Chase at the United States Department of Agriculture, and fern specialist William Ralph Maxon at the United States National Museum.
This article includes public domain text from Stewart Culin's work Chess and Playing Cards: Catalogue of games and implements for divination exhibited by the United States National Museum in connection with the department of archaeology and paleontology of the University of Pennsylvania at the Cotton States and International Exposition, Atlanta, Georgia, 1895.
Betweenm 1882 and 1887 he taught science in various Maine academies, in 1893 he was an assistant in the United States National Museum, in 1894 he became curator geology in the Field Museum of Natural History, Chicago, and from 1894 to 1904 he was lecturer on mineralogy at the University of Chicago.
It was described by American ichthyologists Hugh McCormick Smith and Lewis Radcliffe in a 1912 paper for the scientific journal Proceedings of the United States National Museum, based on two specimens collected in Batangas Bay, south of Luzon in the Philippines.