. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. THE SKULL OF STRUTHIOCEPHALUS KITGHINGI 255 but also in all the other Dinocephalia (anteosaurids, titanosuchids, styraco- cephalids and the Russian brithopids). Brink's figure indicates an error in observation. In the present specimen the outer surface of both septomaxillaries is well preserved and this shows a distinctive moulding of the posterior border of the nostril to form a rounded swollen rim set off by the presence of a lateral groove. I suggest that this moulded structure indicates attachments for a valvular
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. THE SKULL OF STRUTHIOCEPHALUS KITGHINGI 255 but also in all the other Dinocephalia (anteosaurids, titanosuchids, styraco- cephalids and the Russian brithopids). Brink's figure indicates an error in observation. In the present specimen the outer surface of both septomaxillaries is well preserved and this shows a distinctive moulding of the posterior border of the nostril to form a rounded swollen rim set off by the presence of a lateral groove. I suggest that this moulded structure indicates attachments for a valvular closure of the nostril when the animal is feeding with the snout submerged. Occiput. (Fig. 3) The occiput is low and broad with the squamosals bulging laterally to form prominent 'cheeks'. A strong rounded thickened upper and lateral border formed by the interparietal and the tabulars prominently demarcates a deep bipartite area of origin for the nuchal muscles. The interparietal and the tabulars have large posterior faces, whereas the supraoccipital is very low. The large face of the paroccipital is directed much more ventrally than posteriorly. The ridge on the squamosal bounding the external auditory meatus medially is very prominent. The posttemporal fossa is all but closed by the downgrowth. Fig. 3. Struthiocephalus kitchingi. K272 X 1/6. Occipital view. Orthoprojection at right angles to the sagittal and alveolar planes. BO—basioccipital. EO—exoccipital. fq—quadrate foramen, jf—jugular foramen, mp —mastoid process of the paroccipital. pin—pineal (parietal) foramen. POG —paroccipital. ptf—post- temporal fenestra. ptpocf—pterygo-paroccipital fenestra. SO —supraoccipital. ST—stapes. stf—stapedial foramen. Other lettering as for Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the origin
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Keywords: ., bookauthorsouthafr, bookcentury1800, bookdecade1890, bookyear1898
