. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 18. Lystrosaurus murrayi. Nat. Alus. No. Left quadrate region in lateral view. notch is thus formed between the two condyles, into which the articular fits. The anteroposteriorly directed quadrate Ibramen (Figs 18, 22a), which possibly transmitted a nerve to the lower jaw, as Romer (1956) suggested for Sey- mouria, lies between the quadrate and quadratojugal. The inner surface of the quadrate bears a smooth facet for the reception of the posterior end of the quadrate ramus of the pterygo
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 18. Lystrosaurus murrayi. Nat. Alus. No. Left quadrate region in lateral view. notch is thus formed between the two condyles, into which the articular fits. The anteroposteriorly directed quadrate Ibramen (Figs 18, 22a), which possibly transmitted a nerve to the lower jaw, as Romer (1956) suggested for Sey- mouria, lies between the quadrate and quadratojugal. The inner surface of the quadrate bears a smooth facet for the reception of the posterior end of the quadrate ramus of the pterygoid (Figs 19a, 19b). Dorsally to the pterygoid facet the groove widens into a notch, facing forwards along the quadrate ramus (Figs 8, 19a, 19b), while the anterior surface of the inner arc-like edge of the quadrate bears a groove, unfinished in periosteum, above its inner condylar portion. These two features of the quadrate strongly suggest the existence during life of a connecting strip of cartilage between the quadrate and the sharply truncated footplate of the epipterygoid, to form a single palatoquadrate complex. Support for this view is provided by a recessed facet on the lateral side of the quadrate ramus of the pterygoid (Figs 15, 18), between L AT CON. PO C 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
