The auditory<unk> , also known as the<unk> , is the first rudiment of the internal ear. It appears shortly after that of the eye, in the form of a patch of thickened ectoderm, the auditory plate, over the region of the hind-brain. The auditory plate becomes depressed and converted into the auditory<unk>  (or<unk> .
Otic pit
Protruding ear
Ranula
Vitreous bulge
Acalvaria
Choroidal fissure cyst
Hemotympanum
Otic vesicle