. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. r\pc. Fig. 3. Thrinaxodon liorhinus, Specimen D. A, lingual view of the upper postcanines, B, lingual and C, labial view of the lower postcanines. Key to lettering p. 521. cingular cusps are very small. The lingua) cingulum is absent. In crown view the tooth is more circular than the 4th postcanine. Within the even-numbered postcanines there is, therefore, in a posterior direction a progressive increase in the size of the accessory and cingular cusps and a progressive decrease in the si
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. r\pc. Fig. 3. Thrinaxodon liorhinus, Specimen D. A, lingual view of the upper postcanines, B, lingual and C, labial view of the lower postcanines. Key to lettering p. 521. cingular cusps are very small. The lingua) cingulum is absent. In crown view the tooth is more circular than the 4th postcanine. Within the even-numbered postcanines there is, therefore, in a posterior direction a progressive increase in the size of the accessory and cingular cusps and a progressive decrease in the size of the main cusp relative to the size of the accessory cusps. In addition posteriorly the teeth become progressively more longitudinally ovate. Similar tendencies can be observed in the odd-numbered teeth of the same specimen, but the structure of the crown is slightly different. Unfor- tunately the crown of the 7th postcanine is partially destroyed. The remaining portion is similar to the 5th except that the cingulum and cingular cusps are absent and it is more longitudinally 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
