. Carnegie Institution of Washington publication. 208. FlGS. 207-212.—Toxochelys serrifer. Shows cutting-edge and grinding- 212 207. Left dentarv surface. 208. View of inner face of dentary. 20*). Symphysis of lower jaw. Portions of skull of type. XI. 210. Cutting-edge and gnnding-surface of upper jaw. mx, maxdla; pal, portion of palatine. 211. Base of skull, hoc, basioccipital; pf, pterygoid. 212. I'pper aspect of skull, fr, frontals; pa, parie- tal; prf, prefrontal. and prefrontals, and two peripherals. They were collected somewhere in the Niobrara deposits of Kansas by Professor Merri
. Carnegie Institution of Washington publication. 208. FlGS. 207-212.—Toxochelys serrifer. Shows cutting-edge and grinding- 212 207. Left dentarv surface. 208. View of inner face of dentary. 20*). Symphysis of lower jaw. Portions of skull of type. XI. 210. Cutting-edge and gnnding-surface of upper jaw. mx, maxdla; pal, portion of palatine. 211. Base of skull, hoc, basioccipital; pf, pterygoid. 212. I'pper aspect of skull, fr, frontals; pa, parie- tal; prf, prefrontal. and prefrontals, and two peripherals. They were collected somewhere in the Niobrara deposits of Kansas by Professor Merrill, in 1865. The dentarv (figs. 207-209) had not yet become co-ossified with its fellow. Its length is. as Cope states, 48 mm.; its width above, 9 mm.; the depth of the inner face, 7 mm. Longi- tudinally the alveolar surface is more strongly concave than in T. latiremis. Near the sym- physis the surface is considerably concave transversely, but posteriorly it is nearly flat. The inner border of this surface is nearly on the same level as the outer. At the symphysis (fig. 209) the alveolar surface extends nearly as far backward as does the lower face of the bone. The inner face of the dentary is occupied by a broad groove. The length of the alveolar surface of the symphysis is 9 mm. Slightly more than the posterior half of each maxilla (fig. 210) is present. The alveolar surface is flat, and the cutting-edge retains its height to its hinder end. In T. latiremis the height becomes reduced posteriorly. The pterygoids (fig. 211, pt) present no peculiarity. Where narrowest the portion of the palate formed by the pterygoids is 15 mm. wide. The quadrate does not differ from that of T. latiremis, except that the articular surface for the. 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 Carnegie Institution of Wash
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