| OCR Text |
Show 496 DR. R. BROOM ON THE STRUCTURE [Apr. 19, the angle is well-developed as in Marsupials, the cartilage is always much in front and above it. Whether the splint bone that forms round the under side of the back part of Meckel's cartilage and the processus gracilis is to be regarded as the remains of the Text-fig. 100. A.-Mandible of Therocephalian (Lycosuchus vanderrieti). B.-Mandible of Theriodont (Cynognathus platyceps). C.-Mandible of young Mammal. Ang., Angular; Art., Articular; Bent., Dentary; M.C., Meckel's Cartilage (omitting Malleus, which is Hyomandibular); Men., Meniscus or Interarticular Cartilage • Qu., Quadrate; Sq., Squamosal; S.Ang., Surangular. angulare, or whether a tiny little additional splint seen in the foetus of Ornithorhynchus is to be so regarded, is at present doubtful. But there is pretty good reason for regarding the posterior part of |
