. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. On some Neiv Therapsid Genera. 65 notch in one side of the symphysial line—that a small pubo-ischiadic vacuity was also present. There can be little doubt that the large fenestra here is homologous with the fenestra for the obturator externus in mammals and not, as Williston suggested, due to an enlargement of an opening between the four bones of the two sides of the Fig. 10.—Ventral view of pelvis of Choerosaurus dejageri. Acetabulum.—The acetabulum, into the formation of which all three pel
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. On some Neiv Therapsid Genera. 65 notch in one side of the symphysial line—that a small pubo-ischiadic vacuity was also present. There can be little doubt that the large fenestra here is homologous with the fenestra for the obturator externus in mammals and not, as Williston suggested, due to an enlargement of an opening between the four bones of the two sides of the Fig. 10.—Ventral view of pelvis of Choerosaurus dejageri. Acetabulum.—The acetabulum, into the formation of which all three pelvic bones enter, is deeply cup-shaped and not perforate ; and it is overhung by a very strong supra-acetabular crest formed by the ilium. At the puboischiac suture the border of the acetabulum is slightly depressed. There is a large notch behind, and a smaller notch in front of, the supra-acetabular boss. The posterior notch extends down to the ilioischiac suture. The dimensions of the pelvis are as follows :— Antero-posterior length of iliac crest Max. height of ilium Width of acetabular portion of ilium Length of pubis in mid-line Length of ischium in mid-line Length of obturator foramen Width „ „ „ . VOL. XXVIII, PART 1. prob. 36 mm. 17 21 prob. 15 prob. 32 10 20 5. 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
