Dicynodont i a (ANOMODONTIA)

Order of extinct (Tria ic) Reptiles having biconcave vertebræ, a toothle premaxillary Dicynodon. A, Skull of Dicynodon lacerticeps , showing the maxillary tusk; B, Skull of Oudenodon Bainii. From the Trias of S. Africa. bone, probably inclosed in a beak like the turtle's, no clavicles, no obturator foramen, and the ischium as well as ilium joining the sacrum.