130 



AMPHIBIA 



CLASS II 



Skull rounded anteriorly, orbits in hinder third, anterior nares far 



forwards, external bones 

 coarsely sculptured. Pala- 

 tines with minute teeth, 

 maxillae and premaxillae 

 with a series of large, 

 conical, vertically grooved 

 teeth. Dentine deeply 

 folded. Vertebrae rhachi- 

 tomous. Coracoid .ex- 

 panded, with concave pos- 

 terior border; scapula long, 

 slender, tapering. Ventral 

 scales oat-shaped. Lower 

 Permian ; Rhenish Prussia 

 and Saxony. 



Melosaurus, Chalco- 

 saurus, v. Meyer ; Zygo- 

 saurus, Eichwald ; Platyops, 

 Trautschold. Permian; 

 Russia. 



Dendrerpeton, Owen. 

 Coal Measures; Nova 

 Scotia and Bohemia. 



Trimcro rhachis, Zatra- 



FiG. 218. 



Actinodon frossanli, Gaudry. Permian ; Muse, near Au tun, Franc 

 Palatal aspect of skull, with lower jaws. 2/5 (after Gaudry). 



Eniop>' megaceiJhalus, Cope. Permian ; Texas. . , , t^. n =\ 



.1, Lateral aspect of skull. 1/5. B, Portion of the vertebral column. C, Caudal vertebrae. 1/4 (after Cope). 



