red-faced spider monkeys (ateles paniscus) - 19th century - two monkeys stock illustrationsRed-Faced Spider Monkeys (Ateles Paniscus) - 19th CenturyIllustration
von der decken's sifaka lemurs (propithecus deckenii) - 19th century - two monkeys stock illustrationsVon der Decken's Sifaka Lemurs (Propithecus Deckenii) - 19th Century