THE BLEMMYAI or STERNOPHTHALMOI "chest-eyes" were a tribe of headless cannibal men whose faces were set upon their chests.
These acephalous creatures were said to dwell in either Africa or India.
The Chest-Eyes were very popular in Medieval bestiaries and in the illustrations filling the Terra Incognita of old maps....
Compare with Xing Tian :
See also the general type (Anthropophagi)