. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 6o ANNALS OF THE SOUTH AFRICAN MUSEUM General Descriptive Before giving an account of the individual specimens, in an attempted taxonomic order, the general features of the dentition of the infra-order as a whole follows. In the Titanosuchia a full and mature set of teeth gives the formula: it cl, nr - 19 PL 18-21' Where previous authors have given different formulae for their specimens and in the specimens at my disposal, which give a different count, these differences should at present, without fur
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 6o ANNALS OF THE SOUTH AFRICAN MUSEUM General Descriptive Before giving an account of the individual specimens, in an attempted taxonomic order, the general features of the dentition of the infra-order as a whole follows. In the Titanosuchia a full and mature set of teeth gives the formula: it cl, nr - 19 PL 18-21' Where previous authors have given different formulae for their specimens and in the specimens at my disposal, which give a different count, these differences should at present, without further confirmatory evidence, not be attributed to any taxonomic distinction. That the different genera and species. Fig. 2. Jonkeria. The left second upper incisor E. x£. A = anterior or inner view. B = posterior or outer view. C = lingual view. D = labial view. may have had different numbers of post-canines cannot, of course, be discounted; but in the light of our present knowledge such differences should rather be considered to be due to imperfect observation, imperfect preservation, age of the animal, or to the stage which the replacement of the teeth happens to have reached in each individual jaw. Noted differences in the left and right sides of the jaws of the same beast bear this out. The Incisors Both the upper and lower incisors have the structure which has been called 'dinocephalian' by various authors. What these authors really mean is that the incisors have the general structure of the teeth of the Tapinocephalia (especially the Russian Deuterosaurus and Ulemosaurus). Later in this paper it will be shown. 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
