North American Ground Sloths: Plate IX
This is Plate IX from "A Memoir of the Extinct Sloth Tribe of North America" (1855). It shows side and end (articular) views of the humerus (upper arm bone), and radius and ulna (both lower arm bones) of Megalonyx jeffersonii. The bones are 50-54 cm long.
The following are other plates from "A Memoir of the Extinct Sloth Tribe of North America" (1855):