English Skull diagram of the prosauropod dinosaur Massospondylus; showing the various holes in the skull (fenestra). author name string: Steveoc86 Wikimedia
the following images: File:Massospondylus_Skull_Steveoc_86.png licensed with Cc-by-3.0, GFDL 2008-09-03T15:25:41Z Steveoc86 1000x901 (365418 Bytes) Tweeks