148 Supplements to the History

*Various Parts of a Porcupine*

The following illustration displays various parts of the porcupine: the upper jaw (**A**), the lower jaw (**B**), and the fulcrum or support, shown here separated and removed from its natural position (**C**). It also depicts the organ of hearing (**D**), the tongue (**E**), the cecum (**F**), and the tympanic membrane or eardrum (**G**). Finally, it includes the small bone that supports the eardrum (**H**) and the vaulted bony chamber or cavity (**I**).