. Carnegie Institution of Washington publication. . Fig. 2^6 et 237 âPoiâ ihoi .helys browni. Le crâne et la mâchoire inférieure de type. Xi. 236. Surface palatine, mx, maxillaire ; pal, palatine ; pt, ptérygoïde ; qu, quadrangulaire ; vom, vomer. 237. Mâchoire inférieure. ang, angulaire ; art ; articulaire, dart, dermarticular ; den, os dentaire ; sur, supraangular. de près de l'ensemble de la tête apparaît sur la face supérieure de l'os aplati ; d'où il est évident que la tête a été dirigé vers le haut lorsque l'os était à l'horizontale et non pas comme il est dans l'Cheloniida ?. Le processus radiale a été connecté avec la tête et il existait une vaste exca- vation,

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. Carnegie Institution of Washington publication. . Figs. 2^6 and 237 .âPoiâ ihoi helys browni. Skull and lower jaw of type. Xi. 236. Palatal surface, mx, maxilla; pal, palatine; pt, pterygoid; qu, quadrate; vom, vomer. 237. Lower jaw. ang, angular; art, articular; dart, dermarticular; den, dentary; sur, supraangular. of nearly the whole head appears on the upper side of the flattened bone; hence it is evident that the head was directed upward when the bone was horizontal and not as it is in the Cheloniida?. The radial process was connected with the head and there existed a broad exca- vation, or fossa, between this process and the ulnar process. In short, the humerus appears to have had practically the form of that of Chelydra. The distal end of the femur is missing, but the bone was at least nearly as long as the humerus. It was, however, a slenderer bone. The ilium resembles closely that of Toxochelys. Family DESMATOCHELYIDiE Williston. Skull with temporal region rooft over as far backward as the occipital condyle. Large nasal bones present. Choanas placed well forward, not underfloored by the vomer, maxilke, and palatines. Small posterior palatine foramina present. Humerus indicating a paddle-like tore limb. Plastron loosely joined to the carapace. The type of this family is the genus Desmatochelys, but the genera Atlantochelys and Neptunochelys are provisionally included. The two latter are known only from humeri. These are not greatly different from the same bones in the Cheloniidae. Genus DESMATOCHELYS Williston. Desmatochelys, Williston, Kansas Univ. Quart., in, 1894, p. 5. Desmochclys, BoULENGER, Zool. Record, Reptiles, 1895, p. 29. The generic characters are not yet to be distinguisht from those ot the family. The type of the genus is Desmatochelys lowi Williston.. 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

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