Professor B. Burckliardt — On Hyperodapedon Gordoni. 489 



In these figures I have also blackened those parts of the matrix 

 which have not yet been laid bare, in order to avoid any misconcep- 

 tions arising from the supposed shape of the most important parts 

 -of the slab. 



Outlines of the skull of Hijperodapedon Gordoni, dorsal {B) and ventral (F) 

 aspects, from photographs and drawings by the author. One-half nat. size. 

 A. atlas ; Art. articular ; Fr. frontal ; Hy. hyoid ; Ju. jugal ; La. 

 lachrj-mal ; Md. mandibular ; Mx. maxillary ; Na. nasal ; Pa. parietal ; 

 Pal. palatal ; Pmx. premaxillarv ; Porb. postorbital ; Pof. postfrontal ; 

 Prf. prefrontal ; Pspl. prsesplenial ; Qu. quadra turn ; QT. quadratojugal ; 

 Sa. supra-angular ; So. supraoccipital ; .S>. splenial ; Vo. vomer. The 

 fross shows the centnim of crushing, which disordered the surrounding bones. 



