. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. The Anteosaurus-incisors are quite distinct from those in the other carnivorous Therapsids, as for example those usually present in the Therocephalians Gorgonopsians and Cynodonts. In the latter the upper incisors in occlusion lie labially of the lower incisors, whereas in Anteosaums the two sets intermesh as do the herbivorous teeth of the Tapinocephalia. To give the long incisors functioning space the alveolar border of the premaxilla retreats and the upper incisors are directed much anteriorly. Th
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. The Anteosaurus-incisors are quite distinct from those in the other carnivorous Therapsids, as for example those usually present in the Therocephalians Gorgonopsians and Cynodonts. In the latter the upper incisors in occlusion lie labially of the lower incisors, whereas in Anteosaums the two sets intermesh as do the herbivorous teeth of the Tapinocephalia. To give the long incisors functioning space the alveolar border of the premaxilla retreats and the upper incisors are directed much anteriorly. The first incisor is smaller than the second and with its fellow forms a distinct pair, as is also the case in the Pristerognathid Therocephalians. This pair passes in between the number one pair of incisors of the dentary. When fully developed there are five upper and four lower incisors, but even in the same skull the number in the two halves is mostly different. So we have, in 11576, 5 left upper, 4 right upper and in both sides 3 lower; in 11296, 3 left upper, 4 right upper and 2 lower on both sides; in 4340, 5 left upper, 4 right upper and 4 left lower; in 11694 no uppers; in crassifrons no uppers; in 11577, 2 left and 1 right upper; in 11492, 3 left and no right uppers. In those cases where no incisors or incisor roots are preserved there is in the alveolar border a more or less Fig. 5.—Anteo- saums obeli. Re- ferred specimen. ' 11576, Klein-Koedoeskop, Beaufort West. Orthoprojection of the snout on to the plane of the occiput, (x tO. Fig. C.—Anteosavms obeli. Paratype. 4340, Leeurivier, Beaufort West. Lateral View, (x tO. 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. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
