Here is a list of mythical creatures beginning with this letter and I am constantly gathering information from each continent and continually updating.
Acephali (Greek)
Various species of mythical headless men were rumoured, in antiquity and later, to inhabit remote parts of the world. They are variously known as akephaloi (Greek 'headless ones') or Blemmyes and described as lacking a head, with their facial features on their chest. These were at first described as inhabitants of ancient Libya or the Nile system (Aethiopia). Later traditions confined their habitat to a particular island in the Brisone River, or shifted it to India. Some have their faces on their chest, others, who found their heads, carry them under their arm.