First, examine the slide with a low magnification slide viewer or the lowest magnification on your microscope. Middle ear - Portions of the auditory ossicles. Many sections show the footplate of the stapes in the oval window. You may also see portions of the tensor tympani muscle or its tendon which inserts into the malleus. On some sections the stapedius muscle is present.
Most sections also show the opening of the Eustachian tube into the middle ear cavity.
Inner ear - Recall that the bony labyrinth of the inner ear consists of continuous bony canals and cavities, within which lies an equally complicated duct, the membranous labyrinth. This space is filled with perilymph, wich is often stained pink in these sections. Now try to identify profiles of the delicate membranous labyrinth within the bony labyrinth. The easiest place to see this may be in the vestibule where you can see the utricle or saccule. These and other parts of the membranous labyrinth, the semicircular and cochlear ducts, are all filled with endolymph.