Exotic mammals, 19th-century artwork. From upper left to lower right: a three-toed sloth (Bradypus tridactylus); a nine-banded armadillo (Dasypus novemcinctus); a giant anteater (Myrmecophaga tridactyla, formerly M. jubata); a long-tailed pangolin (Manis tetradactyla, formerly M. macroura); a short-beaked echidna (Tachyglossus aculeatus, formerly Echidna hystrix); and a platypus (Ornithorhynchus anatinus, formerly O. paradoxus). 1827 artwork from 'Encyclopaedia Metropolitana', published in London between 1817 and 1845. Thirty volumes were issued in 59 parts, with 22,426 pages and 565 plates.