. 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 &amp;quot;Watson 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 - Stock Image