The Annals and magazine of natural history; zoology, botany, and geology . Lower jaw of Ictidosuchus primcevus, nat. size. The lower jaw resembles much more the Theriodont jawsfrom the Upper Karoo beds than any of those hitherto found from the Karoo Beds, South Africa. 315 in the Lower. In its general form and proportions theresemblance to the jaw of Tribolodon from Lady Frere ( 1894, B, pi. lxxxviii. fig-. 6) is very marked. Thehorizontal ramus of the jaw is long and rather slender andmoderately uniform in depth. The coronoid process is verywell developed, long and fairly thick, an
The Annals and magazine of natural history; zoology, botany, and geology . Lower jaw of Ictidosuchus primcevus, nat. size. The lower jaw resembles much more the Theriodont jawsfrom the Upper Karoo beds than any of those hitherto found from the Karoo Beds, South Africa. 315 in the Lower. In its general form and proportions theresemblance to the jaw of Tribolodon from Lady Frere ( 1894, B, pi. lxxxviii. fig-. 6) is very marked. Thehorizontal ramus of the jaw is long and rather slender andmoderately uniform in depth. The coronoid process is verywell developed, long and fairly thick, and makes an angle ofabout 120° with the ramus. Almost the whole lower jawappears to be formed by the dentary, the splenial being afeeble splint and the articular, which is lost, probably notlarge. Perhaps the most remarkable feature of the form is thesimple structure of the teeth. Seven teeth still remain inthe jaw, and though it is possible that one or two others arelost, those that remain show that there is no marked distinc-tion between incisors, canines, and molars,
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
