Osteographie ou Description iconographique comparee du squelette et du système dentaire des Mammifères recents et fossiles, Paris, J.B. Baillière et fils, 1839-1864, Henri Marie Ducrotay, A detailed illustration of a skeletal structure showcasing the anatomy of a gorilla. The drawing features the complete skeleton in a side view, highlighting the arrangement of bones, including the cranium, rib cage, limbs, and digits. An additional set of smaller bones is depicted above the main skeleton, possibly representing part of the hand or foot. The intricate details emphasize the curvature of the spine and the distinct characteristics of the ape's bone structure, reflecting the scientific purpose of the study in comparative anatomy. The text accompanying the illustration likely provides scientific nomenclature and classification information.