Proceedings of the Zoological Society of London, London, Zoological Society of London, A detailed illustration of a woolly spider monkey, also known as Atelés vellerosus, showcasing its distinctive long limbs and prehensile tail. The subject is depicted hanging from a tree branch, surrounded by lush foliage that emphasizes its natural habitat. The monkey's fur is illustrated in varying shades, highlighting the contrast between its dark upper body and lighter underside. This artistic representation captures the unique features and graceful posture of the species, reflecting its agility and adaptation to arboreal life. The accompanying text provides its scientific classification and contributes to the educational context of the illustration.