. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 236 Mr. R. Broom on the But though in front it has a smooth edge the posterior edge is irregular, as if indicating an ossification in cartilage. The anterior ossification or ossifications probably correspond to the sphenethmoid of Siredon or the frog, and the posterior to the ossification seen in Dinosaurs, Crocodiles, and birds, and usually, but I think wrongly, called alispbenoid. The quadrate is large aud its upper half is largely hidden by the squamosal. There need not, I
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 236 Mr. R. Broom on the But though in front it has a smooth edge the posterior edge is irregular, as if indicating an ossification in cartilage. The anterior ossification or ossifications probably correspond to the sphenethmoid of Siredon or the frog, and the posterior to the ossification seen in Dinosaurs, Crocodiles, and birds, and usually, but I think wrongly, called alispbenoid. The quadrate is large aud its upper half is largely hidden by the squamosal. There need not, I think, be the slightest Fig. & Ang. P. Art. Lower jaw of Lysorophus triearinatus, Cope, X 5. A represents a section at a a. Any., angular; D, dentary; P. Art., prearticular ; , surangular. Fig. 3. ff ^ > Pt. Pty> P. Art y 'An,. Section across skull and jaw of Lysorophus triearinatus, Cope, X 5. The section of the lower jaw is near the point indicated by b b in the figure of the jaw. The outer corners of the parasphenoid are sepa- rated by cracks or sutures. They are believed to be parts of the parasphenoid. Any., angular ; Pa., parietal; , parasphenoid ; , prearticular; Pt., pterygoid ; , surangular. doubt about this bone being the squamosal—the view also held by Williston and v. Huene. The occiput has recently been figured by v. Huene from one of the American Museum specimens and also from one of the Tubingen specimens. His drawing of the American Museum specimen is not in my opinion quite accurate, the American specimen agreeing closely with his figure of the Tubingen specimen. The main difference between the two. 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 London, Taylor and Francis, Ltd
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