Dolphin skull with individual bones highlighted, numbered: 
1 - frontal, 2 - nasal, 3 - ethmoid, 4 - maxilla, 5 - premaxilla, 6 - lacrymal, 7 - mandible, 8 - zygomatic (not preserved in the skull, its position shown by the line), 9 - squamosal, 10 - sphenoid, 11 - parietal, 12 - occipital
<p>Author of the original image: Museum of Veterinary Anatomy FMVZ USP / Wagner Souza e Silva 
</p>
Numbers added by Kostka Martin
CC BY-SA 4.0
<a href="//commons.wikimedia.org/wiki/File:Dolphin_skull_01.jpg" title="File:Dolphin skull 01.jpg">File:Dolphin_skull_01.jpg</a>