ORDER I 



STEGOCEPHALIA 127 



Lower Permian ; Nürschan, Bohemia. U. Scolaris, 



Kilkeiiny, Ireland. 

 Fritsch. 



Jcanthostoma, Credner (Fig. 213). Skull 25-35 cm. long, sharply para- 

 bolic in outline, externally pitted. Orbits relatively small, rounded, placed 



Uroconipbis imnde.''/ordii, Huxley. 

 Goal Measnres ; KilkPiiiiy, Ireland. 

 Caudal vertebrae, l/i (after Huxley). 



Fig. 211. 



Keraterpeton crassum, Fritsch. Lowei Permian ; Nürschan 

 Bohemia. Restored. Vi (after F'ritsch). 



Aii, \j}."-h^.^,, 



Fio. 213. 



Palatal aspect of skull of Acanthoahnna 

 voraz, restored. i/j (after Cre<Iiier). A, 

 Orbit ; N, Internal iiares ; J'ni.r, Pi-e- 

 niaxilla ; Mx, Maxiila ; (Jul, Quadrato- 

 jngal ; PSph, Parasjiheuoid ; /V, Pterj'- 

 Koid. 



in posterior half of the skull, and with sclerotic ring. All bones of the 

 buccal cavity set with teeth. Lower Permian ; Saxony. 



Family '2. Aistopodidae. Miall. (Aistopoda.) 



Body serpentiform, withaut either limhs or arckes foi' their supparf. Vertehrae 

 coustrided amphicoelous cylinders. Teeth simple, cmical, hollou: Bibs slender, 

 with one or two processes. Carboniferous and Permian. 



