. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 224 ANNALS OF THE SOUTH AFRICAN MUSEUM parasagittal section. It is clear that the lateral wall is well ossified; anteriorly the olfactory region has no lateral bony wall; in the middle the metoptic fissure is still widely patent, except dorsally where it is closed through the junction of the ossifications of the otic and sphenoidal regions. Noteworthy is the great anterior extent of the lateral flange of the supraoccipital. This, together with the great forward growth of the prootic, closes the trige
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 224 ANNALS OF THE SOUTH AFRICAN MUSEUM parasagittal section. It is clear that the lateral wall is well ossified; anteriorly the olfactory region has no lateral bony wall; in the middle the metoptic fissure is still widely patent, except dorsally where it is closed through the junction of the ossifications of the otic and sphenoidal regions. Noteworthy is the great anterior extent of the lateral flange of the supraoccipital. This, together with the great forward growth of the prootic, closes the trigeminal incisure with a wide sheet of bone ossified in the pila antotica, but the trigeminal fenestra, through which passes the median cerebral vein and the trigeminal nerve is still large. Laterally to the persistent metoptic fissure lies the slender upper part of the epipterygoid, forming above a roomy cavum epiptericum. There is no posterior process to the footplate of the epipterygoid. When fully developed the epipterygoid would dorsally extend to meet the downwardly directed flange of the parietal. The median septum of the pterygoid is not fully developed in this specimen; but in the American Museum of Natural History there is a specimen figured by me in which the pterygoid septum makes contact with the tip of the para- sphenoidal rostrum. The fenestra ovalis lies low down in the skull with its rim formed by the basioccipital, parabasisphenoid, opisthotic and prootic. The braincase in sagittal view (Fig. 22) In sagittal section it is evident that the brain rests on the exoccipitals, basioccipital, prootics, basisphenoid and the sphenoids. Laterally the brain is. Fig. 22. Moschops capensis 11972 X £. Sagittal view of the braincase reconstructed graphically from a series of cross-sections. / "^ -"—v!-* :pm. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
