frilled lizard skeleton. In reptiles with external ear structures, the tympanic membrane is visible, either nearly contiguous to the surface of the skin (as with iguanids such as the green iguana), or recessed deeper into the head (as with some scincids, such as the blue-tongue skink, and agamids, such as the bearded dragon). The tympanic membrane covers the middle ear cavity. ref: http://www.anapsid.org/reptilehearing.html
One of the most majestic anatomy illustrations we've ever seen: Kate Pfeilschiefter adds an illustrator's touch to the anatomy drawing she created for a biology class. There's a mystical touch to her noble stag, but the way she outlines the muscles only add to the creature's majesty.