. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. South African Fossil Reptiles and Amphibia. 213 The specific identity is doubtful, as the dentition is not well dis- played, but the form is from the middle or top of the lower half of the Tapinocephalus zone. The pro-otic has similar features to that of Alopecognathus minor except that the anterior processes are more vertical and longer. Pr. FIG. 59.—Irregular longitudinal section of Therocephalian No. 4332. A fracture has shown the posterior ramus of the pterygoid, a thin arched plate of bone which
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. South African Fossil Reptiles and Amphibia. 213 The specific identity is doubtful, as the dentition is not well dis- played, but the form is from the middle or top of the lower half of the Tapinocephalus zone. The pro-otic has similar features to that of Alopecognathus minor except that the anterior processes are more vertical and longer. Pr. FIG. 59.—Irregular longitudinal section of Therocephalian No. 4332. A fracture has shown the posterior ramus of the pterygoid, a thin arched plate of bone which posteriorly forms the outer border of the fossa which opens into the brain-cavity laterally through the pituitary fossa. Articulating with the outer face of this plate and rising directly upwards from it is a fairly broad thin slightly curved lamina of bone which articulates above with the parietal. The posterior limit of this bone, which must be the epipterygoid, is not seen ; but the plate appears to have extended sufficiently far back to have covered the pituitary completely from side view. There is a fairly large elongate interpterygoid vacuity. A median section shows a thin median vertical plate of bone lying some distance above this—which plate may be an anterior pro- longation of the basisphenoid or a parasphenoid. Above this is a median bone whose cross-section is an inverted V ; and in contact with the dorsal ridged surface of this is a hollow cylinder of bone which may be open at the top below the roofing bones of the skull. 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 original South African Museum; South African Museum. Annale van die Suid-Afrikaanse Museum. Cape Town [etc. , South African Museum, etc. ]
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