134 



BATRACHIA. 



Archegosaurus decheni; restoration of skull from the superior (A) and palatal (B) 

 aspects, and left mandibular ramus from the outer aspect (c), about one- 

 third nat. size, sculpturing omitted. L. Permian ; Ehenish Prussia, 

 Saxony, and Bohemia, ag., angular ; art., surangular covering articular; 

 d, dentary ; /, frontal ; i.d., (?) infradentary or exposed lower margin of 

 splenial; ju., jugal ; /, lachrymal; mx., maxilla; net., nasal; pa., pa- 

 rietal; pan., parasphenoid ; pi., palatine; pmx., premaxilla; prf., prefroutal; 

 pt., pterygoid ; ptf., postfrontal ; pto., postorbital ; q, quadrate ; q.j., quad- 

 ratojugal; s.t., supratemporals(andprosquamosal); sq., squamosal; v, vomer. 

 (Figs. A, B after Credner, c after JaekeL) 



