https://c8.alamy.com/comp/RMKFDG/annals-of-the-south-african-museum-=-annale-van-die-suid-afrikaanse-museum-natural-history-222-annals-of-the-south-african-museum-the-normal-therapsid-position-between-the-basisphenoid-pro-otic-paroccipital-and-basioccipital-in-scaloposaurus-there-does-appear-to-be-a-hollow-filled-with-matrix-in-the-same-position-as-the-fenestra-in-scylacosaurus-and-moreover-the-depression-figured-by-quotwatson-as-the-fenestra-ovalis-in-scaloposaurus-also-occurs-in-scylacosaurus-and-here-it-definitely-is-not-the-fenestra-ovalis-the-pro-otic-is-strongly-developed-its-anterior-margin-is-overlain-RMKFDG.jpg