North American Ground Sloths: Plate VII
This is Plate VII from A Memoir of the Extinct Sloth Tribe of North America (1855). It shows different views of vertebrae (back and neck bones) and the V-shaped hyoid bone (a throat bone at the base of the tongue) of Megalonyx jeffersonii.
The following are other plates from "A Memoir of the Extinct Sloth Tribe of North America" (1855):