They're not actual worms, they're just worm-like. Remember, the ancient name for a dragon was a Wyrm, and the Ahamkara were sometimes called serpents. When thinking of an Ahamkara, think of [url=http://orig00.deviantart.net/59dd/f/2009/194/8/6/quetzalcoatl___kukulcan_by_genzoman.jpg]Quetzalcoatl[/url], the winged serpent, the Aztec god of Venus and intelligence